Ah, I see what you are saying @kclone - let us say you are sitting there listening to a wonderful recording on your GCs and really enjoying the music. Then you flip to another album and you say to yourself, "Oh, compared to the last album, this recording isn’t all that great!" whereas with lesser cables, you would not have noticed a difference.
The GCs will elevate your listening experience and will reveal more of the sound that you've likely been missing. Great albums will amaze you, ok albums will be just that, "Ok."
I have always found that to be the case. Back in the day you could adjust the sound of a bad recording with the use of a good equalizer separate. Can you still get a separate equalizer?
When collecting albums I would look to see where a good recording was produced and then looked for other musicians under that label.
I do like the GC's for the reason you stated bumperdoo... they make the great recordings that I liked before the GC's sound even better. The bad ones are improved slightly but they will always be just what they are... poorly produced.