No I wouldn't say that at all, but myself and others have been either following the tune development rather closely since whenever we got in (some as early as the very start in mid June '17 or earlier, whereas I got in mid Dec '17 with 1.03) and/or had a hand in the development process. The tune is updated and improved upon via datalogging and community feedback, not solely Mat's own R&D truck. This is especially true for the MT's. He didnt have access to one, so a bunch of us started datalogging to help out.
All that being said, he does jump on from time to time to notify people in TW of reasons for some of the delays and whatnot, and the general goings-on and some of his future plans, like bolt-on parts and a twin turbo kit, as well as other plans for tuning.
So there's a difference between knowing him and the reality of it, which is having had contact with him and even helped a bit with the tune development via feedback and logs, and watching the threads as time goes on and updates are rolled out.