Merlin, "challenged" is a synonym for disablement. Your example proves nothing whatsoever about the hearing abilities of cable sceptics, or cable believers for that matter, since nobody has conducted a similar study of those who claim to hear cable differences to see what percentage of them are "aurally challenged". Or are you assuming that the "aurally challenged" are more likely to be cable sceptics? On what basis do you make that speculation?
Of course, it's possible that those who can't hear cable differences have "less acute" hearing. It's equally (or, IMO, more) likely, however, that electrically identical cables are in fact indistinguishable, given the weight of evidence suggesting that this must be the case, and the inability to date of anybody under DBT conditions to pass a test proving they can identify differences.
I'm willing to accept your hypothesis if you're willing to accept mine, but I'd much prefer if the evangelists stopped raking up old disputes that, in the absence of any real testing, have no possible resolution, and just lead to bad feeling.
-- Ian