I've obessed over page speed in the past and present. Optimized like a mad man... I still do. But you know what... Advertisers just aren't getting with the times! That includes the likes of Adsense, where pagespeed is promoted highly by G. All of these ad companies are STUFFING their banners with GOBS and GOBS of tracking/data scripts. I know one network that will add 400 requests PER a single baner ad... Others add 50-100 all day long and no one bats an eye. Even with the basics... Most are failing to optimize their banner images. I could go on here.. It's rather amazing to watch a site load in 2 seconds go to > load times of 26 seconds from banner ads. You're telling me I can load my full site in 2 seconds, but your banner ads need 20+ more seconds to load... It gets to a point where there's not any information out there on how to reduce/optimize that. It's optimize your site and the rest... Well, no one is even talking about it. Granted, it's NOT an excuse to not focus on page speed. You should be doing everything you can... Regardless, I find it interesting how publishers do all this work, while the advertiers pretty much nullify it in the end.