The official dCS statement on power products (and cables in general) is to consult with your dealer. We do design our products to be as tolerant as possible of external influences so tweaks which may make a big difference on some products may not make much of a difference on ours.
Power cables and network cables are quite a bit different from interconnects and speaker cables as they aren’t carrying signal. Their impact has more to do with what they are letting into the signal path via the power supply and ground plane.
My personal opinion on power cables (and cables in general) is that they are an important part of any system and should be chosen based on common sense and engineering principles. If the marketing pitch sounds too good to be true then it probably is.