Jane_Doe - 10:05 pm on Mar 18, 2011 (gmt 0)
While some people speak of a site-wide effect, I'm seeing a page-by-page effect.
I see both. On the sites with pages that got hit, they do seem to be dragging down the other pages though many are still on page 1 or 2 for their main terms, just lower than they used to be.
On my main money making site that got hit, one main topic area was specifically hit so it is quite obvious what they didn't like.