I think what we've learned here is that pre-reads can be as unpredicatable as admissions.
They’ve all told him admissions doesn’t want to see C’s and wants A’s in STEM classes. Also told him nothing lower than a 4 on AP exams.
B's in Math can be an absolute killer at some schools. Others will let it slide... (mom of a kid who got a "maybe" from Harvey Mudd but positive reread from an institution nextdoor) Both with as much pull as a coach could offer at each school.