I don't.
And yes, I believe cable can make a difference. Another way of putting it is that there's nothing to discriminate between cables with similar R, L,C values - and that's pretty much all. Cables with differing values here can sound different, even as one who tends to measure rather than the tedious business of listening I'll freely admit that. Put another way - cables that measure the same in some quite basic parameters, very probably sound the same, and for domestic lengths of cable of similar geometries it's a vanishingly small difference not worth worrying about. You can also manipulate these parameters and get different results. No magic.
Anyway - the job of the ASA is set a bar on advertising 'puff', that is, to draw the line between reasonable and unreasonable claims in advertising. I dare say many people will apply certain moisturisers and feel[/i[] better for it, esp. if it appears to be endored by a 'laboratoire' . But there is a distinct limit to such suggestions when it strays into express claims to gain sales. RSA could quite simply sold cables as 'exception hand made quality, robust, reliable..' etc and no-one could really quible. Instead the claim was totally unsupported technobabble to impress the uninformed. That is not on. Likewise, certain yoghurt products claiming 'useful' bacteria have been slapped down in the last year. It's not the ASA's job to ascertain the validity of the claim - only its reasonableness*
RSA failed to meet an acceptable standard for advertising.
*likewise, the ASA dismissed objections to those humanist bus ads literally because it's not within their remit to determine if god exists.