This is where the attrition rates on CBI's datasets can be useful, especially compared with transfers into the program. Some schools have 8 freshmen leave one year, but 0 the next, so clearly it can vary. But some are more consistent in one direction or the other (as was noted for the Ivy League set).
Also, those datasets are, I think, based on rostered players. So, "preferred walkons" who might commit on PG but never make a spring roster, may not be being counted.
I agree 100%. I also found it a great resource for players looking to play out of state. If you want to look at a program from the state where I live, you won't find many out of state players in most D1 programs.
Again, this is a great resource. Those looking to go to a camp out of state, check out the info on the database, I believe every conference has been listed. If you see that only a select few from out of state have been on the roster for the last few years, is this really a good way to spend your money?