AJ, audio gear doesn't play by your rules, that you're trying to simplify everything with.
Further, audiophiles are human and subject to perceptual bias, another thing they know nothing of, or simply deny.
Four of the capacitor materials tested are common in speaker crossovers. You didn't look close because all the bridge residual testing was done in the audio spectrum. Besides I proposed the question why you can't hear the differences, supposedly, based on the paper.
I'm not feeling any cheers, as you seem to be combative without looking at what I posted.