The course is copied from CMU's. I have a friend who TAed the first iteration of the MIT course and was a former 251 ta @ CMU. The goal of the mit course was to offer their students the same experience as CMU's class because it was highly successful and they relied heavily on my friend's experiences as a tax at cmu to build the course.

In general, I view this as a good thing. Universities should take the best material they can find and offer them to students even if it's not original.