I've always used my ears and couldn't give a damn about the science really. I fiddle around a lot with my system, way too much in fact as I'm always bringing home a lot of goodies on trial. So before that single blind test, I was already familiar with how each cord sounds like as both belong to me and I find that the differences between them are certainly not subtle. So when my friend helped me with that blind comparison, we just played back the first minute of a particular song that I'm very familiar with, and frankly it wasn't difficult at all to identify which was which.