In regards to Emanuel I can't help but feel it sightly odd to me that you would still interview that many after knowing the academic capabilities of the DCs.
I can understand if interviews came first and you had a policy of interviewing everyone as standard, because then it's just the first step in the process.
But now it almost seems a bit tough on a lot of kids (possibly 200-300+) to offer hope via interview to those who may have just passed academically, but realistically are outside chances.
Seems to be a slight case of not wanting to lose that 'everyone has a chance' ethos of interviewing all applicants, but also coping with increased demand and exam expectations. Bit of a worst of both worlds. I'd be surprised if in subsequent years they inch away from the interviews for large numbers process.