Frankly, I generally do not care for Joshua Bell's playing. I just find it to be sub-par. There's no doubt that he's a good violinist (much better than I, but that's true of almost anyone worthy of the title, "violinist"), but he never seems to quite great. It often seems that he's too preoccupied with the technical demands of a piece (i.e., he doesn't practice it sufficiently) to put feeling into it. I think Gil Shahan, Nigel Kennedy, Midori, and Hillary Hahn are all better violinists than he. I'd also predict that Leila Josefecowiz will be a better violinist with experience and increase reportoire. I remain of the opinion that Anne-Sophie Mutter is the greatest living violinist, though Perlmann could be if he were to invest the practice time (I don't blame him for moving on to other things; he was the greatest in the '80s and '90s). I can't render an opinion about Sarah Chang because I haven't heard enough of her playing.
Reality: An important truth test