I'm using it on 4th gen iPad. The only stuttering that I can recount now is the following:
booting up and sliding to unlock for the first time after boot results in a stutter when the icons "fall" onto the home screen. Subsequent slide to unlocks doesn't have this particular animation stutter.
Sliding horizontally through the app switcher with multiple apps displaying can produce a big stutter most of the time just browsing the different open apps. Opening apps doesn't seem to cause problems in with any animation stutter. Just those two I can think of. I don't think it did it in 7. I'm hoping they fix it in a software update.