I remember hearing a story (I believe from Lynn) about a concert pianist that didn’t practice for days before going to a recording session. When asked why he didn’t practice, he said the fingers have nothing to do with playing the piano.
The pianist was the brilliant Canadian performer, Glenn Gould (1932-1982) http://en.wikipedia.org/wiki/Glenn_Gould. In response to a reporter's question regarding his penchant for studying the musical score in lieu of extended practice sessions (with a mechanical focus on scales and etudes), Maestro Gould replied:
"The fingers have little to do with playing the piano."
Obviously, this an exaggeration and presumes the normal conservatory training and day-to-day practice routine of the world class concert pianist. However, his point was well made: Once the physical element is under control, it is the computer (the subconscious) that must be programmed -- and allowed -- to perform.