re: Without Adam Henry coaching them up would OBJ and Jarvis still be this good?

Yes. Jarvis was a beast his freshman year even if it he was mainly special teams. I remember against Auburn that one year we blew them out at home. He had a killer instinct on those kickoffs and those poor Auburn return "boys" got hammered about 4 times in a row by Landry. He had "IT" and he knew it.