He's very busy. He's really a one man army. But it's like getting your speakers custom made. And being made by one person assures consistency in build quality. If you think you'll get a email from him the day after, forget it. There's other people in line waiting for response.
So I'm sure he replies by the earlier dates. Just gotta be prepared that you won't get a answer right away. When I was in the market for JTR subs, I knew replies won't come right away. But he does reply. And when I was ready, I called, left a massage that I was very interested, that I was going to call back again. Left my name and number just in case. Then when I called he answered. Very nice guy. But I suggest, when your ready, I mean ready to make a purchase, and you get in contact with him by phone, JUST DO IT! And once your a customer, he'll never leave you hanging. Believe me everyone wants the JTR line. Hang at the JTR thread, you wouldn't believe there's repeated customers there..