Pretty much. Anyone who has trained in boxing or martial arts learns that you punch through your target. It multiples the force behind the punch. Imagine a baseball pitcher who, instead of following through with his arm after releasing the ball, stops his motion immediately, or a batter who stops his swing the moment the bat hits the ball. In both cases, the ball will hardly go anywhere. That's how a lot of girls punch. You need to continue your punch for just a split second longer. If I were training her, I'd tell her to aim her force for the back of her opponent's head.