Don't worry, he's just very efficient in responding, like most TDs are actually, perhaps he's a bit "better" at it than others.
But let's face it, they have to make a living, have VERY limited time and in the end, if we're perfectly honest, we all prefer them to spend their time figuring out where to get that discontinued rep or how to cleverly send their parcels even stealthier than the last time, as opposed to investing it to build cute mail friendships with us.
If I want to drone on to unemployed, lobotomized slackers (like myself) to chit chat about the latest God tier Casio release for 7 hours non-stop, I go to Nico Leonard's sub on Reddit, but I don't bother our TDs. They are busy getting us the best reps in the world!
So... Just be cool! No, even better: Be RWI-cool and show some scary stoic, borderline catatonic patience while waiting for a TD to respond and to ship your order and you may even impress an oldtimer or two on here.