Well, the lady I had did, she was really nice. She told me to breathe and said I looked white as a sheep, which made me laugh, so yeah. All relaxingy etc. Also, she actually seemed interested in what I had to say, something I suppose would be really hard to maintain as the day went on, so having someone that is responsive to the student and not just a listening post helps as well, sort of a confirmation that it isn't in vain, the conversation.
That said, there are the reports of those who haven't had such rosy experiences, which is seems a bit bodgy, just hope for a good examiner!
I am waiting to see how relaxation-instilling the 3U examiners will be....