Comparison can't work and those statistic are worthless.Because a 8800 GT would bottleneck any recent CPU and the 570 take advantage of it.
So it's not really the difference between a 8800 GT and a 570 but more the difference between a 10/10/07 computer and a 01.12.10 computer.
The biggest difference it's the more advanced technology and not the performance.Newer videocard will read newer technology much faster because they're build for doing exactly this.
Those statistic tell me exactly nothing.Your newer rig will play older game at retarded amount of fps but it''s more the whole package rather than the gpu.
Welcome to the forums....
I dont quite get your logic.
I once had a 8800gt in my rig, in fact it had the same VGA cooler.
My computer was built about 2 years ago with the 8800gt.
Since then I have not changed a thing except my video cards.
My computer plays games allmost 3x faster then before at higher settings.
If I bought a gtx570 today ,I bet my performance would still increase with the same 2 year old system with any given game, especially Crysis..
In short, the gpu was the bottleneck in my system and still is today.