Then it's a good thing the invitation is for Gallaudet University.
Bit semantical ya?
Would you say that a speech is 'read' or 'listened' to, even in the context of a deaf audience? I would assume 'listened to the speech' is probably the colloquial way of summarizing it even if not literally true.
... either way, that's removed from the point I was trying to make, that perhaps maybe most deaf students at that university (or non deaf students at a different university equally) DON'T have a strong desire to want to hear (or interpret / read) Tim's words on their big day of accomplishments, or a CODA plug.
It is cool though to fulfill a student's request, can't deny that, but also a bit opportunist and patronizing on top of it all in my view if that's his core message which wouldn't seem to be out of character.
To each his/her own.