I am new to HiFi sound systems, but I am knowledgeable on digital systems.
The people that claim the cable does make a difference should offer some scientific explanation of why it does.
As a person that claims it doesn't, I can tell you easily that USB is only a data transfer spec, and as long as the cable implements the spec, the data transferred from one end to the other is at the expected speed on the receiving end of the protocol (which is the DAC in this case). The current USB technology is called hi-speed (commonly known as 2.0) and the USB IF certifies cables/products as hi-speed. If you see ANY cable with hi-speed certification, that cable is no better or no worse than all other hi-speed certified cable.
As for the Monster cable
posted above, it is easy to call BS on their claims. They cite 2 main claims:
>> 1: Advanced high speed rated: 1200 Mbps data transfer rate. Delivers 2.5 times the highest industry specification
This is IMPOSSIBLE, whatever the cable does, the current USB technology (AND the devices that implement this technology) only support up to 480 Mbps. There is NO delivering at 2.5 times the spec, because the devices implement the spec.
>> 2: Heavy-duty dual-layer shielding rejects EM and RF interference for more reliable data transfer. 24K gold contacts maximize signal transfer and corrosion resistance
First of all, EM and RF interference are the SAME thing. Standard EM interference around you will normally only affect over-the-air communication. If you have enough EM around you to majorly flip the bits in a USB cable enough to disturb the flowing data, you should probably run because your brain may be melting anytime soon.
This sort of marketing lies make me hate the company and all of its products immediately, because one lie is enough to destroy credibility. I will NEVER buy any monster products.