Sally_Stitts - 7:45 pm on Oct 16, 2013 (gmt 0)
One result of my changes really sticks out.
My CTR for mobile dropped like a rock, by switching from the 250x250, to the 300x250.
EPC for mobile also went down, in sympathy. (No, it is NOT CPC. It is EPC, when speaking of AdSense. AdSense still INSISTS upon calling EPC CPC, when that is clearly incorrect. That drives me nuts.)