I didn't buy it, but the arguments went:
He was one of the youngest freshmen in the country last season, so he's only really like old freshman aged now. His growth during the season was evident and took place as Duke gave him the keys over Roach. He's a two-way player. He shot very well in the last 10 games or whatever when Duke went 9-1, and has shot well at lower levels and had a really high FT% which should demonstrate his touch. He flashed high level skills in some of those games, especially in the NCAA tournament against the #1 defense in the country, Tennessee, where he looked like the best player on the court and made several highlight reel plays.
The rebuttal is pretty obvious:
Don't trust small samples. Just because it's at the end of the year doesn't really mean it's much less random... the overall splits weren't good. His improvement from what his overall season was last year to what he would be required to do for All-American level is massive. Him being that young means, you know, still essentially a freshman this year. Freshmen usually aren't good, or at least usually not All Americans. Aside from Tennessee, the rest of the defenses in that last 10 games stretch were garbage. The ACC was bad, and we're talking like 7/10 of those games against defenses outside the top 80 and 6 were outside the top 100. They lost that Tennessee game pretty handily. He could still be like 2nd team or HM All ACC, but the jump beyond that would be quite the leap indeed.