AlyssaS, for a good keyword I know, I am actually seeing a page from Digg on page 1 now. It had never been around before.The digg page is a very old one and not a recent submission.
For people who are so obsessed with thin content being as an important factor, I would like to say that I know of so many thin pages on top sites ranking on top for important keywords.It could be from digg or twitter or any other popular site.
There are so many examples where I could see thin pages from lifehacker or engadget moving on to the front page.Many of them are just two or three sentence pages.All they had done is write two lines about it and linked to a lesser known site as the source.
Panda is more about popular sites being pushed to the top, if they have a page for the keyword. G seem to be perfectly fine with thin or almost no content on popular sites.
All they seem to be trying to do is bring the the popular ones to the front, as it would then appear to people that G has unearthed QUALITY. They probably believe that they could beat the notion of spam in google SERPS as these are well known ones and not many would be complaining for thin or no content.