I could swap my Infuse for the S2 at Costco but, after testing it out for just a few minutes, I just didn't see an increase in performance. I didn't speed test it and that's important, so I'm reserving judgement until I can spend a little time with it. For me, it's going to have to be remarkably faster for me to give up the larger screen on the Infuse. The Infuse is an awesome phone and the screen is incredible!