Right, that's what bothers me. I sort of get the impulse, as when I get new gear I occasionally do like to take measurements and be a bit analytical, but that's what test tones are for. Once I know I've got everything dialed in to where it should be for loading, get the cart aligned to track right, there's some demo tracks for sure, but I'm not playing Daft Punk to listen for the P-R-A-T lol. It's this weird zone that happens to be bad art criticism and pseudo science. Again for someone detail focused, he seems to know very little about many of the technical aspects of playback, especially loading, which can cause massive FR swings in MM designs, and tracking. It's why he outright rejects the AT carts (in the past they needed to be loaded differently from the modern 47k standard) and keeps saying the MP-110 out-tracks carts with better styli.
I'll stop ranting now as I don't think Ian is a bad guy, but I am getting tired of his viewers and the cult of Nagaoka taking over so much of the hobby.