That's what NU will tell you, but there have been tons of kids thrown out for grades, but the University will tell you they left because of family problems, or they want more playing time. It's like the U.S. gov't lies about a lot of things, both Dems and Reps.
You have the Stadium plastered in big letters, MOST ACADEMIC ALL AMERICANS whatever, whatever, now NU has an honest reputations for graduating players, but they would never tell anyone this "good" player left because of grades.