One of the mods over at audiominds did a bit of research on this exact thing.

He ended up being so impressed with the difference in sound that he is now making cables for instruments. He researched the cabling, etc. and found out a lot about how a cable is actually a filter. To see his findings (and his cables) you can visit http://purplecables.com

He is an pretty intelligent guy and also had the character to go into it open minded enough to let the results lead him, rather than try to create results. A few of us know him fairly well. I won't speak for others, but it would be nice if they chimed in.. he also offers a lifetime guarantee, has had the cables used in professional settings (lots of use) and has yet to have to replace a cable (well as of last week when I last talked to him).

I do not work here, but the benefits are still awesome
Make your sound your own!