Really? I'm just not clear on what is different between a cat wire and regular wire. I mean, CAT wire is just bundled copper, v5 being stranded. I would think the only thing, so far as cabling which could damage an amplifier would be ultra low gauge wire, (i.e. high resistance), but that would have to be an extreme circumstance.
Given the use of multiple strands (as explained in the article) it seems completely safe. The testers (from this web site) in the article certainly didn't see any problems. Do you have a link to any of that information?