Are people here worried about Fultz's lack of speed and explosion? I mean, he's hardly unathletic, but he doesn't jump out of the gym like other prospects. I think he's got tremendous talent that will translate to the NBA. For instance, he already looks comfortable in the pick & roll, which is a staple of NBA offenses. But I'd be concerned that he'd have trouble dribbling around the corner of a trap, for instance, or that you could put a similarly-sized SG on him and he wouldn't be quick enough to beat the defender off the dribble.
It's really hard to say. The other factor is that he's about to turn 19. Even physically speaking he could be totally different 2-3 years from now.