''Front leg like a bow,back leg like an arrow.'' is the stance i have some doubts,especially when its transformed from horse stance to bow stance for a hit.Reason for this is in many orthodox systems this stance is absent,not presented.And i belive that a poor momentum is created in a turn like this when compared with turns to narrower and more relaxed stances.
Look at these two posts of user Bawang from the topic 'How To Change From Horse Stance Into Bow Arrow Stance'.
I have come to think about static stances or posing are miss-understatements.