All the little live things I know from personal experience that most audio gear out there doesn't have enough resolution for a lot of these effects to be audible. There is also the issue of the resolution of the hearing of auditors who make claims of the audibility of things like interconnect direction and just as important [and far more likely] some auditor's claims that these effects don't exist. I'm lucky in that I've heard audio gear far above my station and that I have regular exposure to un-amplified music. I'm just as lucky in that I haven't been overexposed to really loud amplified music so my hearing isn't completely shot just quite yet. The audio systems that really blow me away all pay attention to the details. Having the right cable and the right interconnect installed properly is one of those details. The greater the cost, complexity & quality of these audio systems, the more important the low-level details become. No matter how fine these audio systems are, they never get the sound of live, unamplified music exactly right. But the ones that get the closest pay attention to all the details of proper system matching, room acoustics and wiring.