My experience is that most docs will use the standard reflex hammer. Usually it is a free reflex hammer that has some drug company's name on it. The only people I have ever seen use the queen's head are neurologists. The flexible shaft of the queen's head allows you to get a little extra torque. The neurologists use that torque sometimes in patients that are difficult to elicit reflexes in. Bottom line is that most medical students and most doctors are not going to have the queen's head.