GTS 250 has 128 stream processors like 9800GTX/8800GTX
or the 8800GTS G92 cards. It's simply nVida's way of rebranding the same thing over and over with a minor change here and there, and selling as a "new" next generation product, of course at new next generation prices as well.
Not really, you can get a GTS 250 for less than 120.00$ More or less the same price as a 9800GTX... But the 250 uses less power and performs better....
Look at the 8800 Ultra... they still sell for 350.00$+ on e-bay.....
Well the performance difference isn't much but yes it uses less power,for under $120 it looks a good choice