netmeg - 7:51 pm on Dec 18, 2012 (gmt 0)
Well no, because I put my 300 x 600 below the fold. Nothing (so far) does better for me than a single 728 x 90 above the fold.
But in the position where I put it, it does just about the same as the 300 x 250 that was there before; maybe a little better. I'll be able to test better once I get closer to my season though.
I bet it's a monster on an iPhone though.