lane violation

[johnsonboys03]

Girls Varsity game. Top two teams in the conference in a tight game with maybe 5 minutes left. R official is in the C position during a two shot freethrow situation. The shooter is standing probably three feet from the line when she request for the ball. She recieves the pass from the official pauses and then steps up to the line. Her foot touches the freethrow line and the C instantly blows the whistle and calls the violation.

My question is... Is that the way you all would call that? I've never seen it done before. I would give the girl a chance to adjust her foot instead of instanly blowing the whistle. What say you?