I get that part. Different cables which are considered "good enough" by the usual RLC standards can measure differently by tiny but statistically significant amounts.
My point was that if there are golden ears who can actually hear that sort of thing there is no reason to suggest that those differences disappear when they no longer know what cable they're listening to.
Looks like we basically agree on all this stuff.
I've heard rather surprising differences in cables, but under very uncontrolled conditions. Could be placebo effects. I actually thought that I did not like the sound of some Cardas cables.
I'm rather surprised that we can fairly easily hear difference in amps but find it difficult to impossible to hear differences in cables. When I say this I am thinking of all the various differences in cable construction beyond differences in RLC:
twisted, coaxial, flat
different types of shielding
radically different insulation materials
rather surprising that you can do all those things when designing a cable but NOT screw up the sound.
makes me want write something in the "Articles" section.