XF 2.2 Significant overhead from additional usergroups in a large XF2 forum?

[Stuart Wright]

We're considering adding a usergroup which removes their permissions to post in some specific (contentious) forums.
We already have a lot of usergroups.

In this thread @Mike says that there is no overhead in an XF1.
I'm expecting the answer to be the same for XF2, but I want to check for sure.
Does adding usergroups add significant overhead in a large XF2 forum?

 

[Harpers Tate]

I, too, would be interested in confirmation (or otherwise) of this.