Hi guys, At the beginning of last December I have modified adsense position on one of my website. Before, the position was on top left of content, by simply centering the block (so, top center of content) I increased my clicks by 75%. But the question is why I decided to change the position. If you use wordpress you might be interested by this plugin : PicNet Mouse Eye Tracking (it's free). This plugin provided me an heat map and i finally was able to see where the mouse of my visitors was the most active, the path they to took to go to the information etc ... Hope this was useful information.