Pjman - 10:29 am on May 12, 2011 (gmt 0)
I did a little digging last night to try to answer this. Looking at about 50 different post-Panda threads on this all over the forum-sphere. Pandas admire forums and not many people saw a dip in traffic what so ever. Most increased.
Not scientific, but it makes me breath a little easier.
It seems blogs with poor comment sections were hit hard though.