When I tried compass mode in googlemaps I wouldnt even refer to it as necessarily "choppy." Its function seemed intermittent. Like Id move to the right, it would jump around rather than scroll. If i moved to the left, it wouldnt even register the movement, then it would spin around real fast. Oddly enough, using google sky worked pretty good, much smoother.
I happened to be in the mall and I tried compass mode on the verizon Droid, and it worked fine. A couple of days before I tried it out on the My-Touch and labrynth worked perfect as well as google maps compass mode. Hpefully this isnt just an issue with the Moment. Im gonna go to a different sprint store tomorrow and test it on a different Moment.
D*mn! I thought i was close to finally making my decision. Still got a week to figure it out. All I know is, my Pre is definitely going back!