It's anecdotal evidence at best. Are rails programmers any more musically inclined than other types? Are programmers as a group more musically inclined than the average person? I don't know, but his statement and you playing an instrument don't mean much in terms of evidence one way or another.

I find this true, but its also true of other languages. Like first commenter noted, closed minded Rails devs are usually close minded.

I don't play a single instrument. Carry on.