Go to my site and find out!!! No link bait from me during this stressful times. Looks like it was on Oct. 2. googleblog.blogspot.com/2007/10/got-blog-help-student.html-PR6 Posted on Oct. 1 googleblog.blogspot.com/2007/10/3-short-weeks.html-PR0 Posted on Oct 4th I checked another site Oct 3rd posting had nothing. To those new to these stressful times the PR export that you see is based on what links you had on that date. Got 100 PR7 links on Oct. 5th well thats going to help your new visible toolbar number. We can argue for hours on how much that will actually help you in the SERPS etc. So on Oct. 2nd (likely in the middle of night in his night gown) Matt Cutts pulled out his trusted Mac SE30 and loaded up all the links that he saw on the internet. He plugged that info into the very trusted and reliable PR formula and voila on Oct. 26th he loaded that floppy disk at Google headquarters. Of course he stopped along the way to slap some sites silly. Anyways you get the general idea. Everything before Oct 2 counts for this update. Who knows what the actually formula is.
Its up his ass. -- Anyway back on topic, thanks Topic Creator for confirming the date range that the PageRank took place, answered my question