Michigan's NBA prospects

Is it me or does it seem like our players are always overly high rated NBA prospects. Which is not a good or bad thing , GR3 for example he was for some strange reason a lottery pick his freshman year and I for one did not get it. Then you have a player like Dawson at MSU who was highly rated but you cant find him on anyones 1st round draft board? Now it is Levert who was lowly ranked had a nice sophomore jump now he has been hurt for the last half of the season and he is still considered a 1st round lock . J.B program must have mad respect from NBA GMs.