Speed is something that doesn't improve as readily as strength or conditioning. More importantly the "motor" tied to speed is either something you have or you don't. Some kids are moving all the time and others only move when they have the ball or when the coach is chewing them out.
Give me a kid with a good motor any day. Everything else can be taught.
Speed will improve in direct proportion to strength. However, it is the strength to body weight ratio that is the determining factor when it comes to speed. The motor that you refer to is more of a mental thing. The players that have it (the motor) are the players that hustle all over the field. They are the players that work just as hard playing off ball defense or redefining as they do when they are going to the goal.
I agree 100% with how important the motor is. Just do not agree on what determines speed and how it can be improved.
