I read it. It was a response to a question from me. It doesn't say anything about cables and whether there is benefit to be gained from paying a lot of money for "special" USB cables.
It depends on the level of isolation provided by the USB receiver. Non-isolated USB receivers (the vast majority) are sensitive to:
- Electrical noise carried from the source to the receiver.
- Signal integrity, which measures the quality of the signal arriving at the receiver. A poor quality signal will require a lot of work from the receiver chip to interpret the data, itself generating electrical noise in the process which carries over, together with #1.
The noise that makes it past the receiver can impact the performance of critical components (the clocks being one of them), which then create other sort of issues (e.g jitter).
Some cables try to solve #1 by removing the VBUS (+5V) connection altogether (works only with self powered USB receivers).
Some devices try to solve #1 by cleaning the VBUS (either by filtering, or by substituting a new, clean power). Think Schiit Wyrd or UpTone REGEN.
Most 'better' cable have a positive impact on #2, which greatly reduces the noise generated by the USB receiver when recovering the USB signal.
Some devices try to do both #1 and #2, like the REGEN.
Whether #1 and #2 yield audible improvement, again, depends on the DAC and its level of isolation to whatever noise still remains after the USB receiver.
Up until recently, cheaper DACs didn't offer any sort of isolation between their USB receiver and the converter, so the effects of mitigating #1 and #2 were audible.
With said DACs, cables like the TotalDAC USB-1 or Light Harmonic Light Speed clearly sounded different from each other and certainly better than your printer cable (I owned both).
More "high-end" DACs, provide some levels of isolation to noise, or jitter (by mean of re-clocking).
Now, if you break the path for noise to propagate beyond the receiver, then you solve #1 and #2 and cables don't matter nearly as much, as long as the message can be recovered in the receiver.
Schiit's Gen5 USB does exactly that, so
cables don't matter nearly as much.