To quote George W's favourite phrase " Who gives a Sh$t"
FWIW, Kimber Select speaker cables sounded dire when I hooked them up. Tried them the other way and they sounded less dire. On reading up LATER, I found that the original orientation was wrong. That's close enough to a blind test for me. If guys want something more anal, might I suggest they need to find a new hobby, plane spotting perhaps.
I have never heard any cable directionality with anything other than the above named products.
I did not know that Naim included cables with their products. Nice idea. It goes a long way to explaining their pricing structure. Those are some f$cking expensive cables