My own extremely amateur efforts in this area support this idea entirely.
Less, But Better: How we collaborate is more important than who collaborates, 2010-Oct-17, by Ben Malbonnington
What the research team found is that the emotional intelligence of the group was as important as its raw cognitive power. And that the better group members perceived each other's emotions, the better the performance of the group (ceteris paribus). They also found that having women in the group made the group more effective as a group (again, ceteris paribus), because of what they suggest is the higher emotional sensitivity displayed by women, on average.