This is something I've noticed since I updated it to iOS6. A few times a session, scrolling will be jittery for anywhere between 1 and 3 seconds before is smooths back up. It doesn't seem to be app specific, I see it in Safari, Facebook and XfinityTV. I've done a restore (as a new device), too. Anyone else seeing this? I assume it's an iOS6 thing, but I haven't seen anything on it.