It takes me well less than a minute to be on my way after I get through the WTMD. I have a specific order: rollaboard goes first, followed by laptop bag, laptop, then purse, liquids, etc. Makes it easy on the other end:

Flip up rollaboard, laptop bag goes over handle, laptop into bag, items stuffed back into purse, which then hangs off the handles of the rollaboard. Fast and easy, as long as the agents don't decide to paw through my belongings on the way.