I would not bang on Blue Jean cable that much here. I also wouldn’t say that it’s snake oil. First thing, it’s the job of any dealer/manufacturer to try to sell their product, so if you ask them if their product is better than a different product, they are obviously going to try to influence you to think their product is better.
They are a distrubitor of Beldon and Canare bulk cable. I have not tested Canare, but Beldon cable is a mixed lot. The Audioholics site is a big fan of the Beldon 10awg speaker cable and they say you don’t need anything more. However, under testing, I found the Beldon to be completely lacking and the standard 12awg stranded OFC speaker cable (basically monster cable) out-performed the Beldon. The Beldon cable just sounded lo-fi and did not have the resolution of even the 12awg stranded OFC.
However, I do find that the Beldon digital products are excellent. Both the HDMI and Digital Coax cables perform excellently. I have not tested these against super-exotic thousand dollar cables, but they have actually performed better than some Neotech HDMI and Audioquest silver digital coax cables. In this case, Beldon and Blue Jean cables know what they are talking about with regards to digital signal transmission.