I rarely access the site from anything other than my iPhone. I have never had a problem with it being slow loading or anything like that. And I've had all 4 iPhones so far(original, 3G, 3Gs, and 4) and none often have ever given me trouble with the site. On sites like ls1tech I actually preferto view in the full site version rather than the "condensed version" but that's just me.