It could be any ’cology’ but it doesn’t prevent claims from being testable.
You can flap your arms and fly, you can leap 10 foot tall beams in a single bound, the earth is flat, you can walk on water, boutique Ethernet cables sound better.
None of these require a rigorous 1000 N sampling for the sake of science or statistics. Neither does the delusion that people are hearing all these differences in same constructed, passes spec, Ethernet cabling. It’s pure looney bin type stuff.
Is there anyone that has the faith in their ears, that they routinely posture with, here? The real issue is that if you are delusional about Ethernet and all these perceived differences then you find it all disappears when bias is controlled for it singularly brings into question everything else you have to say. It’s a credibility buster no doubt. I understand the apprehension that some aren’t the golden ears they’ve allowed their ego to be pumped up to.