As I mentioned, for me, it's how Mia is speaking her mind, not neccessarily what she is saying. There are many ways to say that she expects more from Melinda and Adechike without implying that they are mistakes.
A lot of people on that board are saying it's bigotry, etc. Don't see that because one is white female and the other black male. Also, she's praised minority Jose and other dancers of various cultural backgrounds, as much as she's criticized everyone else.
She's obviously a very passionate person about dance and the dancers do respect her opinion a lot. So, for me, she really needs to express what she really means in a less harsh manner. All she really had to say to Adechike was that his performance wasn't up to her expectations of his capabilities and he needs to improve x, y & z. If she had just said that and not brought up the great Alex Wong, I wouldn't have had a problem with what she said.
Unlike other big egos, she is willing to say that she was wrong. During season 5, she told Brandon she didn't understand why the other judges were so passionate about him after seeing him in Vegas. However, when she watched him compete in the show, she publicly apologized and told him how thrilled she was to be proven wrong.
Other judges have not liked contestants. Tyce DiOrio told Benji during the finals that he didn't even want him in the top 20, but was glad to be proven wrong.
Anyway, what I'd really like to ask the judges after how get they tough on the better dancers and gush over Jose is 'Would you hire Jose or _____ if you had to choose between the 2 to fill in an emergency spot right now on a show you choreographed?'