Ya, as far as most of the reviews and benchmarks are concerned, the new 8800GT beats the old 8800GTS's by a decent margin in just about everything and is just barely off the 8800GTX.
It makes me a little sad that I just bought an 8800GTS 320mb superclocked just recently, but it also makes me happy that I went with EVGA and can upgrade it! If I didn't go evga I would probably be pretty sad here right now, but eitherway they are both great cards. I am going to see what the new GTS's do and probably upgrade to that.