Ok mine runs at 60fps, but very occassionly I get fps drops (fraps shows it dropping to about 55fps, but it feels more of a drop than that). I notice them the most when going fast, say on the bike, in built up areas with a fair few AI cars around.
I'm not sure if it's frame buffer related, HDD access related etc.. Anyone else get the same ? It's only minor, but you notice it in this type of game. Particularly as the PS3 managed 60fps at all times albeit at lower resolution/quality.
I'm on 9.1 Cats, Vista x64, 4870 512MB