Ethan Iverson has a pretty interesting article about jazz pianists and how their individual styles changed (or didn't) over the course of their careers, and he noted that IIRC many pianists whose technique was mainly finger-focused had a significant shift in style later in life versus pianists whose technique involved more arm movement.

Love this guy

His "cancel keyboard" is my personal fave (each button tweets something that'll cancel you), dudes funny as hell

American sized keyboard

Pretty small...