In reply to mike kann: It's clear that climbers before were technically more gifted than your average punter now, and we depend too much in the technology, but, route styles have developed around the equipment used, and though a classic climb will not depend that much on the shoes worn, a modern route will.
And let's not forget that the the first V+ was climbed thanks to his self-made shoes by Pierre Alain, known as the PA and the grandfather of the modern rock shoes, using dedicated rubber for the first time; and that in a matter of 8 years from the introduction of sticky rubber, the climbing grade goes from 8a to 9a, with 2 distinctive pushes, one after the introduction of the fire, and another after releasing the Laser.
We obviously don't climb at this level, but when you climb at your limit 'every little helps'. (As you mentioned)
And yes, fit is more important that rubber (usually), but let's imagine we all have good common sense and know that already.