Nomesorah – those yeshivos are very well known in the yeshiva world, especially south fallasburg and stanford, the latter having one of the finest standards in the olam hayeshivos. South fallsburg is known as an American brisk, where it’s as good as you make it, but they’re not hawkish…zichron melech is also a very established, respected yeshiva.
If you’re right, it would support your claim that rav aharon held that way, because all three of the above were started by talmidim of his; rav chaim Epstein zt”l, yblch”t rav elya ber, and rav meir hershkowitz