Let's just sit down and think here. First off, do you realize that 99.999999% of studios, including the hitmakers, are wired with miles of Belden or Canare cable? And what do you think is inside your electronics? Circuit traces and plain old copper wire.
Secondly, believing that cables make a substantial difference, such as the quote posted above, flies in the face of science. But this science is the same thing that was used to design the equipment and cables all of your music was recorded on, mastered on, listened to, as well as what dictated how your speakers were designed, your amps, etc.
Now this is not to say you've never heard a difference, but whether or not it was a real difference (and therefore easily measurable), or just the result of your brain playing tricks on you is up in the air. I would have to say your brain. Time after time, cables are proven to have no affect on the sound provided they are properly designed.