Age only really matters in his body development, but as far as his skills improving, his experience is still young, whether it's four or eight years of high school experience, that doesn't work on making his skills that much better. Better competition forces development, and I'd think we'd all agree that what he faced in high school was sub-par talent, so now that he's practicing and playing against elite talent, his growth curve as far as bettering his skills is not different whether he's 20 or 24, or somewhere in between. He's still going to see significant body development too, despite what his age may be, because he's now working out in a pro program. He's going to be an excellent player for the Bucks.