Greening: The early the better. the most important thing is you want to gain exposure and be on a schools recruiting radar screen as soon as possible. Schools are not going to recruit a player off a questionnaire, however, it will cause the school to take notice and maybe begin tracking your perfromance.
What is important, is the athlete form gets your name out to schools. Coaches recruit and judge a particular "skill set" you possess not what is listed on the form.