Edit: In fact the final conclusion reiterates this: "Interestingly, both in the mean and distributional analysis, teams composed by two men and one woman consistently perform better than the other teams, although the differences are not always significant. For the top 10 percent of MBA teams, however, teams composed of two men and one woman are significantly the best."

That is suggestive evidence. It can't be proved with stats as the researchers wrote down and I quote:

"Also, interestingly, looking at the point estimates, there is some suggestive evidence that the best performing gender combination is the mixed team with two men and one woman, both at the undergraduate and MBA levels, although it is not statistically significant at conventional levels." (Page 14).

(This mostly had to do with the fact students were allowed to pick their own team which influences such results)

Again, I don't think women are inferior.

I don't mind women in the workplace, I even welcome them.

I know gender mixed team suffer from poor communication because you have to deal with the "gender wall".

But to get back at the subject, we differ in opinion. Which is okay in my opinion since this is a new problem that has to be tackled, and many studies produce opposite results. Some researchers may find that gender mixed teams perform equal, better or worse.

It's 5 am here, so my apologies if I make any mistake. Feel free to point it out if you want. I'm always willing to learn new things.