Per Vandy and the Titans. Watching the press conference with the players this is how they described it. Also in the spring game getting a look at the defense I saw more 1 gap than anything else, although that doesn't mean guys were playing their assignments correctly and I was not privy to blimp film.
Local paper here, which could be completely wrong btw (could be bad journalism), has said the Titans and Vandy will run the same 3-4 1 gap defense. I'll check out Titans tomorrow morning.