Well, well done Kismet! Although i think the 'impressed with performance' clause is a bit standard, I had exactly the same thing with either the UCL or Warwick offer letter. But yeah, not to discredit your ability!
To EamonnHF: i agree it's been hovering around my mind too to sort by subject or at least area. I always put it off as 'not enough offers listed yet, its too early'. Maybe i should get a grip and do it....