These experiments crack me up! I believe he did make 40 $ in one hour, though - 320 $/day. Not bad, is it? It proves that people did appreciate the music, but had no time to stop and listen to a violinist (Joshua Bell or not, Stradivarius or not) during rush hour. Can you imagine a lamer excuse for being late for work than: "Sorry, boss, but there was this fantastic Joshua Bell performing at the subway and I was just like glued to the pavement and couldn't move, I absolutely had to listen to him!"