He's backed up a lot of that stuff in the past. And, there's a lot more to getting into MIT than just your percentile ranking on the SAT. I find it believable that a 90%ish score can get in.
Me: 780 on math; stupid mistakes (eliminated 3 of 5, starred the questions, and when I went back, I answered the 4th thing I eliminated, rather than the remaining thing). Verbal was quite good as well. Selected Alfred Univ for Ceramic Engineering (#1 in the world in that field & #2 most competitive school in the Northeast back then.) Hated engineering - or rather, hated the book smart no common sense engineers I went to school with. After a summer internship, plus the company called me back to work over the winter to do more work for them (related to comp sci minor), I went to academic advising for help with resume/end of senior year stuff. After an interview with them, "wow, it's obvious that you hate engineering." Thought about it, and quit. I kick myself all the time for not finishing up the last semester. I just didn't feel that it was a rewarding/satisfying career. E.g., after 2 weeks of work, could make ceramic floor tile that perfectly matched a color sample from a developer. Or, after 6 months, one of my friends increased a company's yield of a particular compound from 48% to 49.3%. Six months in a lab with one other person, day after day doing almost the same thing, just with a lot of tweaking.
A few years later, I switched majors to applied mathematics, returned to a different university. I was the "University Scholar" - their equivalent of valedictorian of the university. 4.0 in my major, while commuting 32 minutes each way to school, plus working 40+ hours a week at my job, and taking either 18 or 19 credit hours each semester. With a few dozen credit hours through another university in education (4.0), became a math/physics teacher. Then a master's degree & a few dozen more credit hours.