kidder - 11:49 pm on Nov 10, 2011 (gmt 0)
I would bet that actual CTR rather than placement would be the real measure. We run at 3 - 5% and we got the slap, we don't run ads on our product search pages either. I have a client who runs in the 15% range and he's still going strong. If ads were THE factor every webmaster forum on the web would have gone into gridlock by now.