Was not familiar with this fellow until just now. I will only say as a musician and engineer that it's silly for someone who is not a highly experienced recording engineer, highly experienced musician, or a respected music maker in any legit capacity to claim definitive hearing abilities. And if he is claiming that balanced audio interconnects are all basically the same sounding things, nothing past that is of value.
Sensitivity and repetitive practice are key to build our listening skill. AB comparisons at times are needed, yet it's always with the intent of learning how to trust our evolving listening skill. Frame of Reference is key. If our frame of reference is objectivist measurements, we've missed the point of music making and music listening completely. Music is not a science project. Faulty premise.
Measuring one thing in a chain of things as a way to judge it is good for those who have not learned to trust, or who are afraid to learn to trust themselves.