And they are right, most digiheads will think it sounds good on their
devices. I did hear an opinion that $1k Purist Audio USB cable is really
something.
IIRC, USB cables need to have a characteristic impedance of 110 ohms to prevent reflections in the cable that can cause errors. Jim Aud (of Purist Audio) was telling me recently at RMAF that he had to use some really pricey test equipment to make sure his cables met that spec. This was in the context of hearing about a cable that was preventing the DAC from getting a lock (which was happening because it was not the right characteristic impedance).
Most recording studios are wired to keep out noise more so than
audiophile quality. Thus, most studios are wired with Beldon/ Canare
level wiring. Plus, using general data cables and hard drives ( although
Glymph caters to the audio/ video industry, i would not consider them
audiophile since same drives are used as in any orher system)
The thing you want to keep in mind here is that in the studio, most of the equipment operates balanced and supports the balanced standard. The raison d'etre of balanced line is to eliminate cable artifacts and allow long lengths as a result. So they are very much audiophile, in fact sort of uber-audiphile, since most high buck single-ended cables have far more artifact.
In a nutshell there really isn't much of a standard for single-ended cables, and the direct result of that is the way they are built can affect their sound. Over the years audiophiles have grown used to that fact and the need to audition the cables in their system. With it has come the hubris that the engineers in studios are clueless about cables. While that is sometimes true, its a bit of apples and oranges.