Understood John which is why I'm not a fan of paying up for audio jewllery like expensive cables.
On the other hand it is possible that a cable with a certain combination of electrical properties can interact with varying speakers and amps in a way such that sound changes in a room either through phase shift or amplitude response. Whether that difference is an improvement or not is a different story. My approach like Colin Miller's in the article is to keep the signal as neutral as possible and not worry about it.
I'll try and dig up those old articles elsewhere.