If we talk reality, stronger muscles are an advantage in any style. Women tend to have weaker muscles (though not in all areas), so will (on average) hit less hard, etc. But any style that works when taught well (and KM is one) will work for a woman when taught/learned well.And what about girls? Is Krav Maga useless for them at all? Maybe vice versa, Krav Maga is more applicable for girls because nobody expects any hard struggle from them?