I'd think that FS Terran culture is similar to Terran culture in battlestar galactica--men and women hold important positions, though men still generally outnumber the women. In both, we are pretty much damn-afraid of our enemy and trying to survive long enough to win. Now, for GTA military-forces, I'd guess it's about a 4:1 ratio (20% women, 80% men). Most of the women would be less-likely to be serving in front-lines situations, due to stresses that they can't handle as well. For pilots, the women have to be fairly more in-shape then the average. For commanding officers, they'll probably be few and far between because men have a nasty habit of making passes at women under them. Still, women probably have a good 2:3 ratio (40+% women, 60-% men) in the non-fighting areas such as the science portion of the GTA. For female vasudans... we really can't tell by voice or by look. From what I've seen, Vasudan faces are very similar and we have only seen them from shoulders-up in command anis (and they're wearing jumpsuits and likely some upper-body braces). They speak to us using a translator, so we have no masculine/feminine differences in speech. They are supposed to be ultra-traditionalist and complex--that leads me to believe that they likely have similar or the same speech patterns as male Vasudans.
