Well I have a white keyboard, and I play with teh arrow keys (Yes, that's right, and I still kick ass). None of my keys are faded. My older mouse (Got a broken cable on it so I got a new one, same model, anyway) had completely faded it's pattern on LMB, which made it less attractive to use.
I'm either buying good products or I'm some kind of supergently person by nature. I prefer to think it's the sooner