Very interesting article. I have to agree that perceived differences should be measurable, but it might not be easy or cheap to do so, as that article indicates. Of course, the article also mentions that some differences are extremely difficult to measure, such as lifting cables vs. leaving them on the floor, and in these instances, a person's perception is a better gauge.
Something the article mentions, but does not explore, is the fact that all power supplies convert AC to DC, yet the cables, plugs, connectors only improve the AC characteristics going into the power supply. What would be interesting to see, is how that affects the DC coming out of the supply. It is possible that a 18 gauge vs 16 gauge will deliver the same DC, regardless of whether the cable can source 150A or 180A at 20 microseconds. Perhaps a pre/pro or amplifier would see more benefit from a high end power cable, than say a DVD player or DAC. But I suppose the response would differ across every single manufacture and equipment type out there.
