I don't believe that having 9 out of 10 "white"chefs is a coinsedence. You have to look at the demographic of executive and sous chef. A majority of them are "white" males.
However if Food and Wine were to release a "Best New Cook" then that is a whole different story on the ethnic matter.
However if Food and Wine were to release a "Best New Cook" then that is a whole different story on the ethnic matter.