All this talk about pixels on mobiles and accidental clicks doesn't ring true with what I see on mobiles.
My main site (and very similar on other my other sites) is 1100 pixels wide. Typically my Adsense ads are 350 wide. So, when i call up the page on a PC or a mobile the ad occupies about on third of the page width. The same proportion applies to whatever device I use to view the page.
On a mobile ( and a PC for that matter) there is two thirds of the page left for the user to scroll up or down. Even if they (or me) scroll up and down using the ad space no clicks are made when I experiment with it.
Either my mobile devices are acting usually or all this business about false clicks is not based in reality.
And yes, I agree with the last poster that Google is fully aware of the possibility of unintentional clicks on mobiles (if there really is problem) and adjusts accordingly.
Agreed, some on WW site may have gone to enormous efforts to cater for mobiles but that doesn't mean that their efforts have paid any dividends.
Facts only will convince me otherwise and to date no facts have been presented that serving mobile ads is better than serving normal ads to mobiles.