I watch the Beat Bobby Flay program from Nigeria. You can almost always predict that Bobby Flay will win almost every other time because the judges look at their faces and dishes and Bobby Flay will always make facial and body expressions to show that it's his dish being judged.
For FAIRNESS the judging should be BLIND. No one should know the owner of the dish (say DISH A or DISH B) and the chefs should be invited after the results for dishes have been reached by the judges.
Most times I watch I feel like the visiting chef will lose even when it's obvious that Bobby's dish might have received some negatives. My opinion.