久違的Google PR，在我們大家都不注意的時候，于2011年1月20日更新了！
Google PR上次大更新時間是2010年4月3日，之后的9個月時間里便沉寂了，期間引起了我們站長的許多揣測，大家都以為Google PR已經(jīng)成了一個歷史的產(chǎn)物，不再更新了，取而代之的將是Google即將推出的更先進(jìn)、更強(qiáng)大、也更合理的網(wǎng)站評估工具，可惜我們并沒有看到Google在這方面有任何的動作，許多站長也因此而感到困惑，尤其在尋找友情鏈接的時候，到底參考哪些數(shù)據(jù)更為合適。
這次Google PR的更新，到底給我們帶來什么樣的信號呢？是一如既往的延續(xù)下去，還是只為探望一下大家的反響？我們不得而知。
不過Google PR能在這個時候更新，確實給我們帶來了一個不大不小的驚喜，算不算是Google提前給我們送來的新春大禮呢？
卡卡網(wǎng)PR從3升到4
卡卡網(wǎng)在2009年9月份的PR更新時便到了PR3，如此算來，差不多有一年半的時間了，終于不用做小三了！PR4可謂期待已久。
不過，我從多個Google數(shù)據(jù)中心查詢到的結(jié)果還不完全更新到PR4，所以，卡卡網(wǎng)到底是PR3還是PR4，我想此時還不能非常非常的確定。確切的PR，需要至少一周時間后，更新完畢并且穩(wěn)定下來了，才可以確定。
Google PR更新歷史時間表
| PR/BL Estimations: Average days between the last 5 exports. | |||
| Year | Date | Info | Days |
| 2011 | January 20 | TBPR & BL Export | 292 |
| 2010 | April 3 | TBPR & BL Export | 74 |
| 2010 | January 19 | TBPR & BL Export | 19 |
| 2009 | December 31 | TBPR & BL Export | 61 |
| 2009 | October 30 | TBPR & BL Export | 129 |
| 2009 | June 23 | TBPR & BL Export | 26 |
| 2009 | May 28 | TBPR & BL Export | 58 |
| 2009 | April 1 | TBPR & BL Export | 90 |
| 2008 | Dec 31 | TBPR & BL Export | 95/95 |
| 2008 | Sep 27 | TBPR & BL Export | 62/62 |
| 2008 | Jul 26 | TBPR & BL Export | 87/87 |
| 2008 | Apr 30 | TBPR & BL Export | 62/62 |
| 2008 | Feb 27 | TBPR & BL Export | 45/45 |
| 2008 | Jan 12 | TBPR & BL Export | 78/78 |
| 2007 | Oct 26 | TBPR & BL Export | 100/100 |
| 2007 | Jul 20 | TBPR & BL Export | 80/80 |
| 2007 | Apr 30 | TBPR & BL Export | 98/98 |
| 2007 | Jan 25 | Algo update - Reduce Googlebomb Impact | |
| 2007 | Jan 25 | TBPR & BL Export | 18/18 |
| 2007 | Jan 10 | TBPR & BL Export | 101/101 |
| 2006 | Sep 28 | TBPR & BL Export | 76/76 |
| 2006 | Jul 13 | TBPR & BL Export | 100 |
| 2006 | Apr 04 | TBPR Export | 45 |
| 2006 | Apr 07 | TB Program Update FF v2.0f | |
| 2006 | Feb 18 | TBPR & BL Export | 122/60 |
| 2006 | Jan 30 | TB Program Update IE v4.0.513.2984 Beta | |
| 2006 | Jan 4 | Infra Update - BigDaddy | |
| 2005 | Dec 19 | GDPR & BL Export | 106 |
| 2005 | Nov 04 | Algo Update - Jagger 3 | |
| 2005 | Oct 27 | Algo Update - Jagger 2 | |
| 2005 | Oct 19 | TBPR & BL Export | 97/45 |
| 2005 | Oct 16 | Algo Update - Jagger 1 | |
| 2005 | Sep 04 | GDPR & BL Export | 85 |
| 2005 | Jul 14 | TBPR & BL Update | 83/33 |
| 2005 | Jun 11 | GDPR Update | 18 |
| 2005 | Jun 08 | BL Update | |
| 2005 | May 27 | TBPR Goes Grey For 3 Days | |
| 2005 | May 24 | GDPR & BL Update | 32 |
| 2005 | Apr 22 | TBPR, GDPR & BL Update | 111/50 |
| 2005 | Mar 04 | BL Update | |
| 2005 | Mar 03 | GDPR Update | 28 |
| 2005 | Feb 23 | TB Program Update IE 3.0.119.6 | |
| 2005 | Feb 04 | GDPR Update | 24 |
| 2005 | Feb 03 | BL & Algo Update | |
| 2005 | Jan 10 | GDPR Update | 88 |
| 2005 | Jan 1 | TBPR & BL Update | 87/16 |
| 2004 | Dec 16 | BL Update | |
| 2004 | Nov 25 | BL Update | |
| 2004 | Oct 28 | GDPR Update? | ?? |
| 2004 | Oct 28 | BL Update | |
| 2004 | Oct 18 | BL Update Rolled Back | |
| 2004 | Oct 17 | GDPR Update | 67 |
| 2004 | Oct 16 | BL Update | |
| 2004 | Oct 6 | TBPR Update; No BL Update | 106 |
| 2004 | Sept 10 | BL Update | |
| 2004 | Sept 8 | TB Program Update | |
| 2004 | Aug 30 | BL Update | |
| 2004 | Aug 10 | GDPR Update | 158? |
| 2004 | Aug 9 | BL Update | |
| 2004 | Jul 16 | BL Update | |
| 2004 | Jun 22 | TBPR & BL Update | 22 |
| 2004 | May 31 | TBPR & BL Update | 38 |
| 2004 | Apr 23 | TBPR & BL Update | 16 |
| 2004 | Apr 7 | TBPR & BL Update | 22 |
| 2004 | Mar 16 | TBPR, GDPR & BL Update | 50 |
| 2004 | Feb 11 | Brandy: Algo Update | |
| 2004 | Jan 26 | TBPR & BL Update | 15 |
| 2004 | Jan 11 | Austin: TBPR & BL Update | 19 |
| 2003 | Dec 23 | TBPR & BL Update | 17 |
| 2003 | Dec 6 | TBPR Update | 20 |
| 2003 | Nov 16 | Florida: TBPR, BL & Algo Update | 21 |
| 2003 | Oct 26 | 35 | |
| 2003 | Oct 2 | GDPR Update | |
| 2003 | Sept 21 | 23 | |
| 2003 | Aug 29 | 21 | |
| 2003 | Aug 8 | 54 | |
| 2003 | Jun 15 | 40 | |
| 2003 | May 6 | 25 | |
| 2003 | Apr 11 | 36 | |
| 2003 | Mar 6 | 41 | |
| 2003 | Jan 25 | 24 | |
| 2003 | Jan 1 | 35 | |
| 2002 | Nov 27 | 27 | |
| 2002 | Oct 31 | TBPR & BL Update | 35 |
| 2002 | Sept 26 | TBPR GDPR & BL Update | 36 |
| 2002 | Aug 21 | TBPR GDPR & BL Update | 27 |
| 2002 | Jul 25 | TBPR & BL Update | 32 |
| 2002 | Jun 23 | TBPR & BL Update | 30 |
| 2002 | May 24 | 29 | |
| 2002 | Apr 25 | 19 | |
| 2002 | Apr 6 | 45 | |
| 2002 | Feb 20 | 26 | |
| 2002 | Jan 25 | 29 | |
| 2001 | Dec 27 | 32 | |
| 2001 | Nov 25 | 28 | |
| 2001 | Oct 28 | 42 | |
| 2001 | Sept 16 | 28 | |
| 2001 | Aug 19 | 31 | |
| 2001 | Jul 19 | 30 | |
| 2001 | Jun 22 | 32 | |
| 2001 | May 21 | 28 | |
| 2001 | Apr 23 | 28 | |
| 2001 | Mar 26 | 35 | |
| 2001 | Feb 19 | 29 | |
| 2001 | Jan 21 | 33 | |
| 2000 | Dec 19 | 31 | |
| 2000 | Nov 18 | 27 | |
| 2000 | Oct 22 | 54 | |
| 2000 | Aug 29 | 34 | |
| 2000 | Jul 26 | Unknown | |
PageRank更新說明：
TBPR Export: Toolbar PageRank Export - export of Real PR to the Toolbar PR 11 unit scale (no longer called a PR update as Real PR is updated continously and the Toolbar PR change is just an export of that updated value).
Toolbar 工具PR輸出：Toolbar pagerank 輸出，按照11個PR更新等級實現(xiàn)在Toolbar工具欄的輸出更新。
GDPR Export: Google Directory Export - export of Real PR to the Google Directory 8 unit scale (no longer called a PR update as Real PR is updated continously and the Google directory PR change is an export of that updated value).
谷歌目錄輸出：谷歌目錄索引輸出，真正完成PR權(quán)重分配向Google 索引目錄的輸出工作，分8級重要性。
BL Export: Backlink Export - export of a sample of the number of backlinks which is almost meaningless as it is only a sample number. This number can be seen with the link:www.domain.tld command (no longer called a BL update as backlinks are updated continously and the visible BL number change is an export of that updated value).
反向鏈接輸出：反向鏈接更新，基于樣本分析原理的反向鏈接輸出。你也可以采用以下命令查詢反向鏈接link:www.howtostagehomes.com
Algo Update: Algorithm Update - a major update in the Ranking algorithm that causes a large SERP change.
算法更新：算法更新，一個重大的排名算法更新，導(dǎo)致大量的SERP變化。
TB Program Version Change: Toolbar Program Version Change - a software version change to the Google toolbar that displays PR.
ToolBar 軟件改進(jìn)：Toolbar 工具軟件的改進(jìn)計劃，指Toolbar軟件發(fā)生升級改進(jìn)后，直接影響Google PR更新。
