pixar24 - 1:28 pm on Jun 4, 2012 (gmt 0)
@ Trueman: I also use DFP.
But on my site on certain pages, someone elses Adsense code is used. He doesn't use DFP and he sees a difference of 40% between his estimated and finalized earnings, for May. So this also happens for non-DFP Adsense users.