Kispert compares favorably against past great shooters. His numbers are actually identical to Reggie's, except that he shot more 3's and he weighs 30+ lbs more.
Unfortunately, tankathon didn't have guys like Ray Allen, Peja, Kyle Korver in their database for me to compare Kispert to.
Kispert's WS/40 is extremely high. Very few players have it that high. The ones that do are actually good players in the NBA. This indicates to me that Kispert won't bust at all. The question is, how good will he be?