Go back and look at Tom shaking hands with Nick at the beginning and NOT shaking hands with Nina. I knew then she was going to lose. Tom sees himself in every young male chef and it makes him lose his balance, literally.

Tom always has a valid argument but changes to a different argument when it serves his expectation that boys are better chefs than gals. "Consistency" can be argued many ways; Tom just uses that to get the guy to win. Over and over and over again.