"She will never learn the most necessary, most difficult and principal thing in music, that is time, because from childhood she has designedly cultivated the habit of ignoring the beat." Letter to Leopold Mozart (24 October 1777)
The most energetic song I ever heard live by the Boss, Bruce Springsteen was in 1978. The song PROVE IT ALL NIGHT begins with a long piano solo by the professor in a style that can only be called “Roy”.
The band accelerates from there.
Average speed=118.9 beats per minute
average beat=504.6 milliseconds