[Zachery]

Originally Posted by Dean C

I'd doubt that vBulletin could handle that kind of load without removing a lot of the core code. Side by side a phpbb/invision board against a vBulletin board - i'd have to say that I think vBulletin would be the more resource-intensive out of them

Not so true, phpbb and IPB by default have alot of semi inteisive options on and there is no "quick" way to turn them off.

By vBulletin you could turn almost everything that would be removely server intensive off including store your css somewhere else. There was an attack on vBulletin.com right around the vB3 release (beta 3) 1000 users looking at one thread, and the server load didnt bugdge one bit