Recently I have noticed that many sites are ranking very well with the default twenty ten theme. The page loading time of twenty ten is great and it is one of the best seo optimized themes. Type anything related to wordpress in google and some of the top ranking pages would be seen using twenty ten. I think page loading time is one the critical factors for the success of this theme, since it heavily influences bounce rate. But I have doubt regarding the potential performance of adsense with this theme. Won't that large header image kill adsense CTR, by taking up a prime ad spot and distracting visitors? What do you think of the twenty ten theme? Is there any other equally good and free alternative? I have tried many free themes, but nothing compares to the page loading time of twenty ten.