Broadway - 6:17 pm on May 15, 2011 (gmt 0)
My large pandalized site covers a broad spectrum of subjects. All of them fit very validly within the overlying topic, but it is quite a range of subjects.
Some subjects that ranked well for weren't really the topics you would first associated with the overlying topic (in fact I was always complaining that I was revising and creating more content on these subjects (so to maintain traffic) but I wasn't all that interested in them).
After Panda it seems that most of this site's Google traffic is for the "core" subjects (the one's you would, at first thought, expect to find on this site). It's like Google has decided what topics I have a right to be be an authority on.
Of course, the subjects with the highest traffic, had the greatest amount of traffic to loose, so maybe this is just a side-effect and not the cause. Also, the "core" subjects I now get traffic on are relatively less competative, so maybe, once again, that's what I notice but it's not related to cause.