When on occasion I ride the train or buses downtown there are often buskers at some of the tunnel stops. I can say I almost never stop to listen, even if it were genius I probably would not see it that way at the time. Commuters have too much else to think about, where they are going, that guy who smelled like pee on the train... shit like that. Buskers also are usually confined to places where people are walking through, not actually standing and waiting for transit, which I'm sure makes a huge difference in whether people would listen or not.