BigJake: I've served with women who had (previous to them serving in my unit) experience in infantry units. To my knowledge, they did good jobs (enough they were promoted.
My first CO in the Army was a lady whose previous post was commanding a rifle company in MAGAV (Israel's border patrol. They walk through the desert and kill terrorists.)
I've met girls of various ages who've been drill sergeants, infantrywomen, martial arts instructors, tank crewmembers, etc. etc. Are they 50% of the IDF's combat branches? No. (It's harder for a girl to get into combat branches than for a guy, here). But they are not some kind of unusual animal.