droidxcon i've tested inspire, nexus s, droid x, etc, but i'm strictly comparing smoothness to the iphone 4. imo while its a small maybe trivial issue i think it takes away from the experience. i've actually spent the last 4 hours researching this issue, ie the difference in smoothness, and i think it has to do with gpu hardware acceleration. It appears the ice cream sandwhich will be the first version to support hardware acceleration. I was hoping that the power of the atrix would compensate but the more i read the more discouraged I get.