"Yep, that's right." He grins, and cocks an eyebrow. "Good at physics too, as well as profiling, eh?"
Jack does actually know a fair bit about how it actually works behind all the controls, but he's not giving away any of that to anyone else, and especially not someone from 3,000 years before it was made. But, because he does love an audience, he takes a minute to show Reid some of the few functions that still work - the scanner, the communicator, how to create a half-size hologram of someone - and how he would work the transmat if that function hadn't been taken from him, again.