I like Tom a lot but am not nearly as confident in his studies of psychology given the fact that he thinks capacitors sound the same as a general statement. They don't measure identically and the differences don't always appear to be appreciable in measurements but... I'll say it all day, anyone who thinks they can't hear any difference is fooling themselves, as opposed to those that think they do are fooling themselves. What's amusing here is he used capacitors that I'd quantify as sounding good, in his builds. *Note I would discount tests where people will have a bunch of basically the same, if not THE same capacitors and try to quantify based off of that.
He does however mention that some people 'tweak' something then switch back and say it sound better, well, I believe that is a frequent possibility and/or thing. Not all changes are good. In fact I'd say a boat load are bad ones.
I'd say he's mistaken about the commercial viability of his amplifiers. The only real issue is he ncored himself in a sense. Basically there are some mega system that could benefit greatly from one of his amplifiers.
Why Tom doesn't have people banging on his door for even more work than he already does is slightly mysterious. What more could you ask for? Talented, super nice, and already has free health care.