alephh - 5:30 pm on Feb 7, 2010 (gmt 0)
This Sunday looking normal so far. The 6-day horror show ended (*knocking on the wood*) just as razor sharply as it started. CTR, eCPM, CPC, etc all jumped back to the normal.
I just wish I knew if Google fixed/changed something this Saturday, or did I manage to counter the problem (I have been checking, re-checking and fine-tuning all "possible-penalty-causing" things I may have done in January). Or maybe this was just some adsense-algo test that I was part of ("lucky" me).