I remember playing this game and getting goated at it when I was in 6th grade. one thing that I think is a contributing factor to the high scorers is the time when in medium if you're going fast enough you can get spots where it doesn't load. then, if you get fast enough in those timeframes, it can go on and on until you reach 1500.
I think this'll be good accuracy training now that I do more FPSs