Please visit some pages with google search of the phrase "ctr above 10% adsense flag". Basically with Click fraud rate shooting up, google has flagged that rate. Meaning of flagging is, once an account is flagged ctc drops significantly and automatically, demographic distribution and traffic sources comes into play more! eCPM drops. Big brother's Bizarre Algorithm thinks " you cant have that high CTR, if you have , cant get that high CPC, if still you manage to do, cant get your final payout release, if by some luck you get that, cant get the pin, and god forbid you receive the PIN also, an email is expected before you withdraw the amount" "After reviewing your site, we feel that it may lead to invalid activity. so please understand that we are forced to suck your money out of the Hell" "Welcome to google the Boss's Dungeon"
I am agree with you, this is the right placement for adsense and I am also using same place on my site. thanks
Good tip on dimensions. 336*280 text ads below post title. 728*90 text ads below header, right? Above the fold is the initial content that can be seen, " the portions of a webpage that can be visible without scrolling." http://en.wikipedia.org/wiki/Above_the_fold