Sgt_Kickaxe - 2:24 am on Aug 6, 2011 (gmt 0)
A blank page will render in under half a second, a single adsense unit jumps the load time on a blank page to 1.6 seconds which is already above the Google 'fast line' of 1.5. These are the average I achieved on my test site and they leave a lot to be desired imo.
I am doing the opposite. I took Google's advice and added more ad units to each and every page "as they suggested" --- and started running image based ads on a site "as they suggested".
I did the same and saw a reduction in overall traffic and a jump in bounce rate. I cant be sure the reduction was because of adsense but it sure didn't help. I did see a small increase in earnings but it took it's toll on my site quality.
Google has the technology available to make the ads much faster but it's not worth the resources on their part for small publishers. I hope they revisit that soon.