Yes & yes. Using 3 Samsung 2494's. VSync set to Always On in CCC. The only thing I really know about VSync is that people usually turn it off, but somebody else suggested turning it on in CCC and it works fine for me.
Also, I get the water effect on the windshield now in Dirt2
hmm well v-sync bascially when working properly will keep your fps to 60 frames per second which in return will keep your picture quality nice and clean.. no tearing or stuttering ( not microstuttering)
some people say v-sync increases input lag and some people are sensitive to that. I always keep v-sync on because I hate screen tearing it drives me nuts. Unfortunatly for me forcing v-sync via CCC isnt doing a damn thing which it rarely worked for me anyway. I always used d3doverrider with the riva tuner download and it was a god send. D3doverrider isnt working when multiple monitors are enabled.... Maybe I am doing something wrong.