What level (standard, grade) is Prokofiev's sonata in D Major for flute?

The Prokofiev is very difficult. I can't imagine many high school students having the musicality, technique, sound, control, and colors to handle this piece.... I played it as an upperclassman in college, and am glad I waited that long to learn it. Could I have played the notes before then with some sense of dynamics? Yes. Would I have butchered it musically? Yes.