They are the exception rather the rule.For the record, there are some beastly women out there, not all women are 5' 100 lbs:
I don't know too much about the military but looking at this from the perspective of a manager in order to make a business run smoothly you want to maximize on the areas that an individual excels in while working to improve on areas that they don't in any downtime that you might have. So coming from that perspective I would say put people in the position that they do best in (that they're best qualified for), I don't care about whether they're male or female. You need the right people in the right position to maximize efficiency. Of course things don't always run that smoothly but I think having that perspective and being flexible enough to 'wing it' when you have to is what makes you successful.
I'm not sure how much that would apply to the military but 'winging it' is the last resort, if you need someone to take on a role that they aren't the best at then you use them as a last resort. I wouldn't put any woman or man in a combat role just to satisfy societies demand for what they perceive to be 'equality'. You put them in that position if that's the area that they're going to excel in or if you run out of other options.
Just my perspective.