I was watching some hands on videos of the S4 and was pretty disappointed to see that the interface is laggy in some areas and overall less than perfectly smooth. There's absolutely no excuse for it considering how powerful the hardware is, and shows that Samsung's priorities are all wrong (throwing in a hundred random new features but neglecting the basics of the user experience). But I've seen some comments saying those were just pre-production units. Is that just a fanboy excuse or can we really expect to see a major improvement in smoothness by launch? Is there lag on the Galaxy S3 for anyone who's owned one? UI lag is my biggest pet peeve, and that alone is making me consider the HTC One for the first time despite the S4 beating it in almost everything else.