Gene, I wonder if you might elaborate on this statement, "They measure considerably superior to standard 10AWG zip cord..."
What is "standard 10AWG zip cord"?
In looking at the DIY Cable Faceoff measurements, the Sound King V1 seems pretty "standard". Yet, it measured lower Rs ( 2.17 average vs 2.9 for the 8PR and 5.6 for the 4PR) lower C (20.81 pF/Ft vs 87 for the 8PR and 39 for the 4PR). In fact, though we don't have DCR in the Faceoff to compare to (odd?) the only metric where the Kimber actually measured "superior" was inductance: the V1 was higher at 0.213 uH/ft vs about .041 uH/ft for 8PR and .074 uH/ft for the 4PR. As for "considerably", yes in that parameter only, the Kimber does measure considerably better, but cable inductance at any of these levels is probably insignificant in therms of performance.
Perhaps I'm not looking at the same "standard 10AWG zip cord" you are, though. But it does seem there is a bit of a price differential...in the opposite direction with superior measurements except for inductance, even with some other cables in the Faceoff.
If you were referencing other "standard 10AWG", please post those measurements.
I also submit these hopefully constructive criticisms of the review structure: It would be helpful when providing test data to also provide a reference point where a given metric would become influential in a typical installation. How much Rs is a problem for a typical 25' run? How much C per foot would be an issue with a typical power amp and speaker? And so on, to scale the relative merits of each measurement for those unfamiliar with the effects. Otherwise, statements like the one quoted above may lead readers to assume that one particular cable is vastly superior to another in performance, when clearly that is not the case. It would also help graph readability to provide a better vertical scale that would make reading between the lines easier to estimate. Major divisions are easier to read if assigned to .1, .2 or .5 rather than .4.