I'd probably lose this bet....

I've been in electronics all my life. There is one facet of audio and the audio community that I am having a difficuilt time with. SPEAKER WIRE! I would BET $$ that there is NO person that could guess which wire he was listening to if the run was, say 20 to each speaker. I would be referring to the VERY BEST cable one could find and compare it with the same gauge of Monster cable or similar. I would guess that the person could not guess it all 20 times. And the other thing that amazes me is that some speaker cable is labeled for the "correct direction". In my archaic way of thinking ac or dc does not know the difference. I might be WAY off base, but if I am I hope someone sheds some light on this for me. ( $1,200 for an 8 foot set of cables??? )B