diberry - 5:18 pm on May 15, 2011 (gmt 0)
All my sites are small, and so far Panda hasn't seemed to affect them much. I have noted some "junk" at the top of the SERPS since Panda 2.0, though.
On a keyphrase where I'm #1 and most of the other top results for years have been worthy web pages from companies like Ehow ranging to smaller blogs. But immediately after Panda 2.0, in the top 5 pages for my keyphrase, I found 5 blatant duplicates of my #1 page (and am now working to get them taken down). They're all at least a year old, and I check the serps for dupes every few months, so those pages must have been buried deep somewhere until Panda 2. Ehow and other biggies are still near the top like always - I can't remember exactly who was in every position for 5 pages, but my sense is that these copiers have knocked out smaller blogs for their new position.
Other than that, I do think there's something to the theory that Panda is mainly hitting bigger sites right now, for whatever reason. I'm just not sure that's the *only* reason junk is rising to the top.