Exactly! ^^ to first part. We all know that there is a difference (often drastic in high end audio equipment and low end euqipment, however drastic can often mean only 5-15% difference in sound quality, But that 5-w/e % can seem like a 30, or enven 40%+ to the sound appreciation and perception of the sound. and it is discernable, it makes it more artful, wider, and pleasing presentation. There are reviews and information on these cables, and each review finds each cable does sound differently. Unfortunately though, it is all subjective to the listener, and many of these reviews are in German. Personally, I would say that recabling improves the way I enjoy sound by 30%, and that's 30% I do not want to go without. I still A-B my stock cables now and then just for kicks and giggles, reveling in the level of detail intelligent upgrades do yield.
On the higher end cables such as the 550$ Diamond or Coffee it better sound better. We would expect it to, or nobody would buy it. Again, in my subjective opinion the Coffee produces the most loving "proffessional monitoring" but still warm detail sound, and when paired with an analytical source you hear everything in your recording. with the 650 it's a sheer winner, and with the grado it bumps my toe tapping to new heights!
You cannot unprove or prove it to the average folk. They just have to try it out and see what they think about it. Some may find it's not worth the money, I however, have simply found that it is. And I have scrutinized many a audioshops inventory, gone out of my way, and spent hours to reach my conclusion. To me the difference is clear as day. It is not placebo, and is a worthwhile to at least try out if you're that skeptical. I would like this thread to become a "witness thread" where all those who've recabled either their headphones or their source cable share their findings with the word.
I cannot post anything more strongly as it will be flamed, so try it or live in darkness never knowing for yourself. That's all there is to it. If you hear the difference, then that's great, but don't give it a flame before at least dipping your toes in the water. And if you have given it a try and didn't appreciate it, come back here and flame me all you want. All I can say is that it seems the only people who flame are people who've never once put their hands on anything besides the stock cable, so how would they really know?!