The obsession with speed and technical perfection (exemplified by op. 10no2) is just a temporary phenomenon, characteristic of our times, and it will go away again. It would not suprise me if, in 20 years, musical charisma, vision and originality will override "technique" as standards of evaluation.
Naw, music is always in vogue. Whatever kookyness us musicians come up with,
people are always in it for the music, they don't give a damn about speed one way or another.
I like the Kapell quote, it makes sense, it's easy to lose sight of the music when technique becomes the focus. Musical immaturity I'd call it.
On the other hand I remember somewhere in his book, Neuhaus says something about how a lot of the great pianists go through a phase of technical obsession. That makes sense to me too, then once the novelty wears off what we're left with is a pianist with a wide range of expression.
I'll admit I'm impressed by speed, but I'm more impressed with playing so beautiful that I don't even realize the speed that's going on.