I thought I would enlarge on these comments, because they are so easily misunderstood.
Personally, I think those movements aren't conscious ... they are in muscle memory ... much as velocity control is for a pianist. It's really nice to see someone playing in that zone.
Medeski rocks. I like that his approach to tonal control is not studied, but integrated into his personality. I also love that he is doing 2-3 levels of musical development at the same time in his solo. (tonal change, call and answer, etc.) Even with other instruments, he subsumes technique into the flow of the moment.
You can do drawbar stuff on the electro that is impossible on a B3. (The rhythmic clicking thing would be similar to Josef Z hitting the octave +- buttons, or Tony B hitting the Prophet 5 preset buttons with one hand while playing with the other.)
I can't offhand think of something the electro interface makes easier than the B3 (maybe it's pulling 8, 2&2/3 and 1&3/5 out while pushing 4 and 2 lol, maybe it's the rhythmic aspect). But someone will invent something.
I am trying to encourage people with electros to find what uniquely works on their instrument. Just as the B3 players who were given something different from a pipe organ ... did.
Somebody compared this to an electric guitar, which has precious little tonal control
inside it after the note is struck ... yet has developed an evocative idiom and techniques, many of which use external devices.
Treat your instrument (any instrument) as though it has a unique purpose. Only then can you find it's purpose.