After the dot.com bust cratered EECS enrollment (down by more than half after being steady for decades), MIT revised its curriculum and completely purged Scheme from it (or at least the required parts). It's all Python and Java now :-(.
Because it is noise (do you really think that either the poster or the rest of HN need to hear that you are impressed by MIT?), and also because it isn't even stated that he did go to MIT.