Our Weblos girl den wipes the floor with the boys den, granted its a small number of kids, but its not like BSA was the only place to learn scouting skills. (We do not have any type of den competitions this is purely from observing them at Pack meetings and Camp outs).
These girls have a choice the boys do not. They could do the non-uniformed social club with traveling, amusement parks, crafts and cookie booths but they are choosing patrols, uniforms, and camping.
So a patrol winning at a camporee isn't surprising.