Based on the number of recitations for various MIT math courses in the fall, it looks like the median MIT frosh had a 5 on calculus AB:
- 18.01, 7 sections, no advanced placement
- 18.01A, 7 sections, 5 on calculus AB
- 18.02, 7 sections, 5 on calculus BC
- 18.022 (more theory than 18.02), 3 sections, 5 on calculus BC
So, while many MIT frosh have advanced placement, it should not be assumed that every one is so advanced that having “only” calculus BC is barely keeping up.