Well, the start-up time for Terry's moves haven't really changed. They said that the EX and the regular buster wolf are the same start-up which made it faster. However, in Arcade, the start-up for it was 11 frames.
I don't think it's 1 frame or even 4 frames, but there's a way you can test it. Use it as a punisher for moves you know the recovery frames for. For example, Kyo's qcf+D. Set a dummy to do it and then block. If you can't punish him, it's more than 3 frames start-up.