I don't know, certainly Ken Bob has earned the write to throw in his two cents' worth, as has Jason, but I don't know about the whole coaching thing. If Jason says he's helping people I'm willing to take him at his word. But there do seem to be more and more people jumping in with dubious qualifications and authority. I can't imagine listening to a local guy who'd only been boxing a couple of years lecturing me about, say, proper footwork.
Still, I don't want to dismiss technique out of hand, because I've seen it work in other areas. Possibly also running may not come as easily to some as to others. I've been pretty active most of my life, but if someone has sat for a long period of time, or never did any sports in school, then perhaps the coaching is necessary for them. And I wouldn't want to write it off completely for me either, but as so many have said here and in other threads, sometimes you should just trust the way your body feels, provided you are already in tune with it.
I guess I always return to the question: what do the pros do? There's a lot of money at stake, and every second or millisecond counts. Dr. Mark is the only public barefooter I know of that runs like a pro, so for the time being I'm going to try to emulate him.