nomis5 - 1:56 pm on Jan 21, 2012 (gmt 0)
To balance it out, virtually all pages on all my sites have a 336 x 280 ATF - occasionally a 300 x 250. None have been hit.
My experience is that there is a % or two of websites who have 80% of ATF stuffed full of ads. To my thinking Google are going after them and Google have my 100% support if that is the case.