You shouldn't be so quick to be dismissive. It also seems to be audiophiles are the only ones who are prone to product d elusions. So many get a kick out of being anti-audiophile in attitude.. Not saying this is you.
Everyone needs to consider people listen differently. I've honestly have gone to a friend's house who is an audiophile and his system was in mono without him realizing it. It took me only a couple seconds and brought it to his attention. Another fallacy is listening being equated to hearing acuity. Perfect hearing will not allow one to hear the differences in gear or cables or whatever. This takes experience and learning what to listen for. It also helps if you use a system you are familiar with. Some who have had systems for years may still never get it. You have to listen intently enough to pick up on nuances. There are different depths to which we listen. If someone doesn't listen with depth or intensity they may never get it. I think that's why some don't understand claims that are made by others. If they can't hear it, it must not be true.
It's simple for me there are aspects I hear in my amplifier that no Class D so far has delivered. I am the type of person that just sits and listens though, no browsing phone or whatever, no other side distractions.
AJ is a joker, jester, if that story is even true I'm confident I wouldn't have been fooled.