Brilliant response, thanks for posting this. I'm a small handed pianist (secondary instrument, really a saxophonist) and am interested in whether you have links to resources (books, videos, etc) on the training and methodologies you're discussing.
Taubman made a series of videos called "Choreography of the Hands". You can now find them on YouTube.
They were originally VHS, and they are very eye opening. But there isn't anything like having a real lesson.