really if you think about it its supposed to be held straight-finger not lower-finger like most controllers. You keep you palm to the arms while your thumb into the key pads, your other fingers circle around the controller while your ring finger or pinky goes to the bottom for the L and R buttons, i know this becaue a freind of a freind of mine told me that he has hled it at E3!!!
maybe STARK CAN HELP US OUT