If the Omega Ethernet cable is anything to go by, I'm sure it's as amazing as you say.
With respect to materials used, e.g. silver, I'm sure that the materials used (e.g. for the conductors) play a role, but likely not the whole story. For example, there are other USB cables that utilize silver, but don't do what the Omega USB cable does. So, it's not as simple as using silver in a USB cable. My thought is that it is the entirety of the design: the materials, the individual conductor and overall cable geometries, construction methodology, connectors, and trick Shunyata proprietary technologies, e.g. dual TAP modules, CMode filter functionality, as well as other functionalities, e.g. capabilities that reduce or attenuate clock phase noise and detrimental noise factors e.g. high-source impedance leakage current, all play a role to allow this cable to deliver in the manner it does. This cable is designed as system of functionalities and quality attributes; its not any "one thing" that provides the performance it delivers.
You said it before, Mike, when referring to the all-Alpha v2 Shunyata loom, that 1+1+1=10, and I'm pretty sure a similar thing is going on here.
Cheers.