It’s hard to say. Princeton took 3rd in the 4x800 at Heps with 3 freshmen. Harvard took 4th with 2 freshmen and is bringing on, among others, Myles Marshall “The 800m specialist with a personal record of 1:48.43 is a two-time Texas State Champion, New Balance Nationals All-American, USATF Junior Nationals runner-up, IAAF World Juniors qualifier and, oh yeah, the reigning World Youth Olympic Games champion.” (from Flotrack)
I know for a top athlete like your son, the world revolves around T&F but as I mentioned before, that all ends. IMO he’s going to be better off finding the best fit academically. Hopefully he’ll get a good feel for the schools on official visits this fall.