Well, the results were done with a blind test, so not so subjective actually!
You can try the test as well, if you are interested. You may very well not have the same results as me, given differences in systems. Had I started out upgrading cables before my amp and speaker upgrades, I highly doubt I’d notice the difference in power cables or USB cable lengths. Part of the journey when you realize it makes a difference, objectively through blind tests. Some will never get there and that’s okay.
There’s one thread on here where a dude was going on with all the usual arguments - what about all the wire leading up to your house, and the non-audiophile approved wire in your wall (actually I do have audiophile approved 10AWG twisted wire in my walls, lol)… Anyways everyone challenged him to try a demo at his local dealer going between power cords, and to his credit, he actually did, he said “I don’t know how it makes a difference, but it does.” And impressively, he said “I was wrong.” Again, not everyone will get there.
This subject is like religious fundamentalism, and it’s highly amusing how worked up people get.
Apologies for giving you all a bad name, lol!!