Huge fan of your bikes, Cannondale! One day I'd like to own a Scalpel SE! Anyway, on to my comment. One huge tip he missed for speed management that is kind of obvious but still needs to be mentioned, is gear management. He talked about pedal management, but choosing the right gear depending on gradient is also crucial to carrying speed. Pro XC racers change gears very very often during a race, and it's for that very reason (also for energy management). Good video though!