Interesting article here on the number of deaf students in higher education:
The authors state that there are about 25,000 deaf (including hard-of-hearing) students in U.S. universities, and a few paragraphs later gives the number for Gallaudent and RIT, which amount to slightly more than 10% of the total number. That is a lot, you'd have to admit. Still, that means roughly 90% of deaf students, about 22,500 or so, are in other schools.
An interesting point a bit further on in the article is the reason why many deaf students drop out: inability to decide on a major. Probably many non-deaf drop out for that reason, too.
I would guess that you are right, shushugah, that there are not many deaf students in the highest-ranked schools. However, in my opinion, that might not be so terrible. Better to complete a degree in an average institution than be overwhelmed and drop out of a first-tier one.
If you finish your degree at MIT (is that where you are going?), then kudos to you for that, because that will be a wonderful accomplishment. Not many people, hearing or deaf, will be able to do that. I hope you do well.