Great advice about knowing your student. Thing is, no one really does know what they are capable of until they are placed in the situation.
Think of athletics. S06 was friends with many people on his D1 basketball team. One of the guys was complaining to him, saying that he wishes he was in high school again. Why? Because in HS, he was big man on campus, averaging 25 points per game and the star of his team. At the D1 school, he struggled to be a starter.
Academics is the same way. Some kids never try in HS, but thrive in the difficulty of college. Others are the opposite. But there’s literally no way of knowing how accurate your own kid’s 32 ACT is.