SanDiegoFreelance - 5:48 pm on May 9, 2011 (gmt 0)
I do not believe that panda has been established to the point of solid predictability. I've ran a few tests on quoted material with a link to the page that has the material ... only around 50 word though. It is the normal method used by drupal sites to promote content using a quotation and a link.
Results were same site google picked up the article. Cross site similar PR google picked up the article. Cross site with quotation on one site higher PR (over 3 PR higher) and a site with matched PR (less than 2 PR difference). Google jumped back and forth - currently liking the quotation over the full content.
I do not have faith in these results leading into the future.
Added Google's rhetoric is that panda is not running everyday.