I watched Michael Douchette's video (
http://www.youtube.com/watch?v=DZ5T1y3O5V8) . I also believe that he believes these are good cables. He tells a good story too.
Some people take cables to extremes. I met the guitar tech for a Big Star who told me how they cryogenically freeze all his Evidence Audio cables to rearrange the molecules (in fact they freeze
everything - FX pedals, amp chassis, mains cables, the lot). If he can tell the difference, good luck to him. If you think that's nuts, look at the hi-fi world. You can spend five grand on speaker cables - easily.
I have one expensive 20ft cable that was given to me that has a capacitance of 11pf/foot. I actually don't like it much. It's pretty bright. If I had that cable through all my rig, I would have to change my amp settings. Would it sound better? Maybe.
For me it's down to weakest links. I don't think my Geo L cables are the weakest link in a chain that includes an Electro-Harmonix delay and an amp that cost seventy quid