This is making no sense to me. How can an air pressure differential be faster? You mean the air flow will be faster therefore the pressure is less on top of the ball, this means it is a riseball. But in order for it to be a riseball it must have some amount of backspin. And 'yaw' is defined as deviation in the horizontal plane (left or right) so how can the 'large dot of yaw', whatever that is, be angled up?