I've never seen the article, thanks for sharing it.
It did not suprise me one bit that nobody stopped to listen to him. The super-duper long article never really addressed the fact that because this was during morning rush in a busy location, that people didn't have time to stop whether they liked the music or not. If they were anything like me on their way to work, they timed their commute every morning down to the minute with no time to spare.
Duh!
Furthermore, most people probably are not familiar with what Joshua Bell looks like, let alone up close, if they know who he is at all. Yes, he's a famous violinist. I've heard his name, but I'm not very familiar with him or his music. So, the only thing all those people witnessed in their hurry to get to work was a few seconds of a guy playing violin. Then they were gone.
What was this experiment supposed to prove?
The only people who would have acknowledged him are those either familiar with his work and had the time to stand and listen, as one lady did. She saw him on stage a couple of weeks before. Of course she knew who he was!
A better experiment would have been to place him in a shopping mall, maybe an outdoor one on a nice day where people would have had more time to stop and listen.
But this experiment was a waste of a good opportunity, a good performer, and lots of words.