although... from all my monster cable training... frequencies travel down wire at different speeds, so yes, wire is wire, its just getting the right frequencies to travel down the right wire to make sure the high pitched sounds dont go through faster than bass and you get a time shift effect. thus not a "live" sound
in air, sound travels at just that, the speed of sound
in wire, the lower the frequency, the slower it travels in comparison to higher ones
yea its been proven =P lol
edit: same with rcas and every other wire.
say one large solid strand... bass travels down thru the middle, higher pitched sounds travel down the "skin" of the wire, the outter part