@7thgear
From looking at the pic I think he is not lying flat on the tank and also his left leg seems to be resting on or near the back of the seat ? maybe he was planning to stand up on the bike or something equally crazy ?
if he tucks himself under the screen that is the lowest drag riding config anything else will add to the drag. Also at high speeds, depending on the wind speed and direction, there can be strong buffeting if you dont tuck in nicely under the screen and riding long distances at high speeds while getting your head smacked by the wind aint a lot of fun