I think I like the Farcry 2 picture best. He says how the GTS250 beats the 5750 by .8FPS, then clearly forgets to point out thats at 1680x1050 only. If you look at 1920x1080, or 2560x1600 you'll see the 5750 win, and by more then .8FPS. (1.3 and .6) Frankly the two are so close in performance I consider them all a tie. The 5750 ~ GTS250 ~ 4850. The performance between all three cards is so close you'd never really be able to tell them apart. I also think asiankid should check his links first, as his clearly shows the 5750 having better performance.
Sum of FPS Benchmarks 1920x1200
with anti aliasing, 8AA, GTS250 146.90 5750 181.50
Percent normalized
all Resolutions GTS250 344.50 5750 358.20
Sum of FPS Benchmarks 1920x1200
with anti aliasing, 4AA GTS250 202.80 5750 221.30
Sum of FPS Benchmarks 1680x1050
with anti aliasing, GTS250 378.50 5750 386.50
And of course the power and temp numbers are better for the newer 5750 as well.