Welcome 2 ChefTalk, Buddhabong.
Believe me when I tell you this: I looked for the so-called "ranking" of schools. There just isn't one. Nobody does it. Any school that tells you this is lying to you. Sullivan is a great school. I talked to one of the instructors when the ACF convention was here. I'd guess he was a cuisine instructor (he had CEC on his jacket). Sullivan also has accreditation through the ACF. If this is where you're deciding to go, you made a good choice in my opinion.