Yeah, Tyler has really good funding. I'm not sure it's unusual at all. The grad students I spoke with there all had funding for TA, for both years, I'm pretty sure. One told me she chose Tyler (partly) for the excellent financial aid they offered.
During the interview, a professor asked me if I'd be able to support myself for the first semester, but I don't have any studio art courses at all (so it would be pretty silly to think of me teaching).
Granted, Tyler photo is a small department, and my guess is that the other departments are pretty small, too. But it has amazing funding, that's for sure.