Update: It seems as though it's still happening. Lots of keywords are dropping again and others going up, then dropping within a few hours. I'm not sure what is happening at all, but it seems special. Meanwhile one of my "white hat" sites has gone from 6 keywords #1 to 17 keywords #1, pretty much all within the last 3 days. I put "white hat" in quotes for a reason, before you derail the thread to a KKK hunt. My uneducated guess is they fucked up with the initial release on Penguin, so this is the 3.1 release.
Anyone seen their keywords jump up and stick?