Just to back up zealous a little... he had every intention of interviewing at the school, and even traveled to the city for the interview (from what I understand). For this reason, he really had no idea that he would've hated it that much at the last minute. There's no way the admissions office could've replaced his spot within a day's notice. Also, I'm pretty sure they're bright enough to realize that an interviewee didn't show up, and they can therefore send out another invite if necessary.