Does whip snapping (?) laundry before you hang it make a difference?

Help me settle a debate. My wife believes that holding a shirt by its shoulders and whip snapping (I don't know the verb to describe it) it before hanging it gets wrinkles out.

I feel it's a meaningless ritual and a waste of time. Whether I do it or not, I don't perceive any difference. The weight of the shirt itself flattens any wrinkles as it hangs.

Is there any evidence (scientific or otherwise) that whip snapping laundry does anything?