The 250 mile rule has very little, if anything to do do with it. Most are regularly training within 1-2 hrs from their house, because they can get that top level training and coaching close to home, and they get a ton of personal attention. Not a lot of interest in regularly driving over 4 hours for their 1 hr private lesson or 2-3 hr practice. There are more than enough RTCs, clubs, and private workouts close to home that almost no one needs to go further than 60-90-120 miles, let alone 250 miles. If they really wanted that, PSU, Cornell, Lehigh and Penn are under 250 miles, as are plenty of other clubs and private workouts. They'll drop in to those further away places a few times a year, but it's not their regular routine because it's too far.