While I've never heard any of Elton John's songs from this performance being whistled by people on the street, the music is engaging enough to want to hear it a few more times after leaving the theater.  Better yet, my advice is to listen to this recording BEFORE enjoying the live performance.  Given the British accent and some questionable acoustics, one can miss important chunks of lyrics in a theater setting.  If you close your eyes while listening to this recording, you can even visualize the dancing.