[Gobiner]

On our team of about 14, we have 3 girls, and I'm 98% certain that those 3 girls are intimidated by their male counterparts. This is our second year, and we have 3 people returning from last year. We 3 guys are from the general 'smart kid' caste, so everyone on the team (I think) is intimidated to some degree. The problem is:
a. We have limited skill in social situations (I'll admit it)
b. We have previous experience in this application of engineering
c. Most of the other team members don't
So, we can't really empathize with the situation of the other team members, and we have difficulty including them (we're a pretty cohesive group). As someone mentioned earlier, the girls seem to lack initiative (in our case most of the team has that symptom) but I think it spawns from the intimidating nature of our team.
Anyway, just one guy's take on the issue during a period of late night rambling.

EDIT: We forced our girls to work on the robot. Our speedy box flipper was the work of two girls. Two are seniors, and they tend to do PR type stuff, and our sophomore worked on the robot more (she's the younger daughter of aforementioned 'smart kid' so she's probably less intimidated).
EDIT2: I'm less coherent than I had thought.