This is just straight-up gossip, but why not:
Tegmark used to go around polling physicists at conferences about which interpretation of quantum mechanics they prefer. A colleague of mine said that they were sitting near Tegmark and saw him fudging the numbers in his notes — erasing the non-Many Worlds tallies from those who said they supported Many Worlds as well as others, IIRC.
Fun fact: The plain vanilla physics major at MIT requires three semesters of quantum mechanics. And that's not including the quantum topics included in the statistical physics course, or the experiments in the lab course that also depend upon it.
Grad school is another year or so of quantum on top of that, of course.
(MIT OpenCourseWare actually has fairly extensive coverage of all three semesters: 8.04, 8.05 and 8.06. Zwiebach was among the best lecturers in the department back in my day, too.)