Why limit Hashem? Trust in HIM and let HIM decide where he learned!
As long as he was serious and dedicated, why should you care?? BTW, one of the best kept secrets for serious, devoted, well adjusted happy deep, baalei Midos Bnei Torah is Tal Torah in Brooklyn- Rav Lederman. My neighbors s-in-l is from there and it is an amazing place… drop in and see/feel for yourself! Try there for amazing well rounded Talmidei Chacamim who are real ovdei Hashem with NO GAAVA!!