Reno - 4:41 am on Mar 5, 2011 (gmt 0)
I usually ignore Adsense insistence on adding bigger ads.
It seems a lot of folks here see a relationship between AdSense and a big drop in Google rankings, but I gotta' think it's a coincidence and other factors are mostly at play. I have zero adsense and I've been nailed as bad as some of the other percentage drops being mentioned. I wish I could say what is the villian, but I can't figure it, and in any case it's almost certainly not as simple as one single thing.