Just came from teh VZ store...to me scrolling wasnt all that smooth and phone didnt seem responsive. I compared it to the droid x next to it and the X definatly swipped faster. Not sure about iPhone.
One good thing and i dont know if it was a fluke, but the 3g on the thunderbolt was faster than the droid x. on speedtest.net i got 1.5mb with tbolt and 5-700k with droid x. Tested several other phones even mine and all the same. I live in a 3g only area so found that to be strange.
Actually came on teh forum to see if anyone else saw the same.