From what I heard while I was there, there's just one guy who likes to do stress interviews. If you don't have him, then you're fine, it's not like the school policy to do stress interviews. In fact, both are mine were pretty mellow (although, my second interviewer couldn't really speak english well, which made things a little difficult).
But if you do get him, apparently he just likes to tell you you're wrong a lot, and disagree with pretty much everything you say.