Samsung Captivate :: Captivate Running Slower Than Before

so i have been wanting to switch a android phone for a while and a bud hooked me up with a captivate, i used it for about a month or two and switched back to my iphone because the android just ran slow as molassas which it should do on the captivate which has some beefy specs as i understand. so i switched back recently the 2.2 release (froyo)popped up on the net and everyone harped about how its 8 million times faster, so i upgrade to the 2.2 release following some instructions on gizmodo or some site similiar, now the phone runs even slower perhaps if i was to strip the at&t 2.2 and put back on just stock standard android 2.2 it would improve? am i not flipping a switch? i am dying to try out a android phone that supposedly can beat my iphone, please any advice, suggestions, smacks upside the head.