incrediBILL - 6:24 am on Feb 3, 2013 (gmt 0)
Expecting to improve your site speed with a free account is silly. Having been a web host, I can't imagine they're giving free customers the premium servers unless all accounts run across the same cloud servers, which if that's the case means even the paid accounts aren't any better.
Besides, AdSense doesn't load until after your page renders so someone with a slower computer (smartphone, tablet, old desktop PC like those still clinging to sluggish old XP machines) will have an even slower load time based on the rendering speed of their browser, possibly factor 3G into that mess, so the speed is all relative. Also consider that no matter how fast your servers are, if someone is loading pages over a 3G network, it just takes as long as it takes.
For those that don't know, Google has some page speed testing browser add-ons and mod_pagespeed for Apache and some other cool tools:
Also, sites on dedicated hosting servers can suffer from the default 10mbps NIC cards if they don't upgrade to 100mps NIC cards like I do on my servers which makes a HUGE difference.