having the levers high allows you to activate them without interference by your knuckles, according to some people´s body position. I run my clutch almost above my handle bars, so that when i use the clutch (with my index finger) it won't hit/stop at my middle finger knuckle. the lever goes above it. also having it up, makes the space between the bar, and the lever shorter, so that you can pull it in, even if your hand is directly perpendicular. basically, it is more important to have good/comfortable clutch use in corners where you are more often sitting then standing, than it is to have perfect use in the air, or most other places that you would stand. although, generally you would set them it a little further for supercross, due to the rhythem sections, and bike swallowing whoops. front brake levers should be set down a bit lower though, allowing you to have your finger on it comfortably, while over gripping the throttle.