Emacs users will agree. Indeed I am 100% convinced that being an Emacs user enabled me to pick up the piano and be better at it than I was the last time I played 20 years ago.
This is fascinating and something I've wondered about. It'd make for an interesting study, and actually, I wonder if you know about any research that has been done on this subject. I'd be curious to know if the data backs up the intuition!
I don't know of any research; I base this statement purely on the intuition that piano shouldn't feel this natural to me. Typing itself could account for it, but I think Emacs has more piano-like dexterity requirements than typing in general. Another variable is that while I had't played the piano in a long time, I have done other musical things, and so just being a better, more experienced musician could also have an influence.