Michigan is the best at putting guys into the NHL and it's really not close.
LetsPlayHockey.com compiled a list of every ex-NCAA player to play in the NHL this season. There are 279 former college hockey players who played at least one game in the NHL this season. Nearly 10% of those went to the University of Michigan.
The Wolverines led all schools with 25 guys in the NHL. The next highest? Boston College, North Dakota, and Wisconsin with 16 each. That's a rather sizable gap. FYS has 15 and Minnesota has 14. I don't see the list online, so you'll have to take my word for it.
Additionally, there are 197 guys who played college hockey this year whose rights are held by an NHL team. 13 of those are Wolverines. (That doesn't count Travis Turnbull who signed with the Sabres despite being undrafted.)
With Montoya up in the NHL now, you could officially make an entire team using former Wolverines:
Mike Van Ryn
Not a bad roster.
So let that be a lesson to you young'uns out there. If you want to play in the NHL, come to Michigan :-)