Hardware Ad-hoc slowdown?

[yokomoko]

My brother and I just got a couple of PSPs but we've noticed a pretty big problem in ad-hoc mode. Maybe this is normal but alot of the PSP isos have major slowdown and choppiness when we do ad-hoc multiplayer. In UFC 2010 and GTA Vice City Stories for example the framerate drops down so low as to be nearly unplayable. Does anybody else have this or know how to fix it? We're using a PSP-3000 and PSP Go on 6.35 PRO B3 if that helps. Thanks for any help!