Yes, but it's by the number of people.
There are currently 120 members and 67 guests (187 total people) on the boards.
So it's not running too bad.
But when we get around 200 it really starts to chug, 250+ begins the breaking point of having no pages load etc.
Not having avatar, sigs, postible images, attachments, and polls would cut down on the resorces a lot and make it run smoother, but they switched over so they could use all those functions.
vBulletin does take less power then the old ubb, but with all the new funtions we are using it takes more.
And they haven't even turned everything on yet.
So, it's all really up to what you want on the board.
I think it's okay the way it is even if it does chug a lot when a bunch of people are on.
BTW for the most part membership has reached it's saturation point.
We've only gotten like 200 new members since last friday, so the rush is over.