Testing Stereotypes

Following up on the report that women have been disproportionately targeted by the US military's DADT policy, I have a question:

Is this happening because really butch lesbians are more likely to sign up for military service than effeminate gay men? Is there something in the culture of the military that makes it more likely for women to be outed than men?

Or are the numbers simply too small to draw any statistical conclusions?