My suggested text (either is fine with me, let me know which you like, or suggest something else):
"Ability to load pages faster than free users"
"Priority access to LiveJournal's servers, so pages will load faster than they do for free users"
All of the stuff in that FAQ has URLs with them, but I can't think of a URL that could go with this, unless we link directly to the paidmembers entry about it. I'm thinking that should be fine, but I'd like input from others about it.