The only reason Kanter was considered a top HS recruit and the only reason he is being considered for top 3 selection is that great Summit game a year ago. Before that he was not considered anywhere near the top guy coming out of HS, and after that he did not play a competitive game and lost development time due to inability to not only play, but even practice with the team this year. To get a historical perspective of how top scorers from the World's team do in NBA, I looked at previous Summits starting at 1995. I am going to list top scorers from Worlds team, who got at least 15 points with their scores in parenthesis.
Here they are: Zemljic(22), Bogojevic(22), Palladino(16), I. Rakocevic (17), J. Victoriano (16), D. Nowitzki (33), M. Neilsen (23), V. Illijevski (19), Fotsis (15), T. Parker (20), O. Oyediji (19), L.Bogdanovic (20), Martynas Pocius (20), Sakota (15), M Tepic (16), Mouhamed Saer Sene (15), Batum (23), Motiejunas(21), Macvan (23), Enes Kanter (34).
Now, granted only Dirk and Kanter crossed 30, but if you look at this list in general, there are many guys who had terrific games at the Summit, but weren't even good enough to make it as a third stringer in NBA. Out of this entire list, only Dirk and Parker are starting caliber players. Batum is a good back-up, and others don't even belong in NBA. And these are top world team guys we are talking about here. Now, we have Kanter, whose only claim to fame was that he did great in that game. Even from US team, if you look, there are few (if any) guys who did great in that game who are actually deserving of top 3 pick. Casey Jacobsen put up 31 points, and he is not even NBA player.
The point is, this game historically, especially when you look at world's team, shows very little as far player's potential and worthiness of top selection. And yet that game is the only reason why Kanter is considered as the top pick.