Sorry, meant to say some below the top X performers in the exam DO get an offer, not don't.
And I agree about the dull over-prepped for answers - what can you really tell when you hear them - nothing, and so the 'don't know' pile is the most likely place, and if a kid was marginal in the exam, they haven't advanced their position.
Giving an answer of some sort, especially with some kind of reasoning is good, regardless of it is seems the kid of answer the model academic, mature adult would give - after all they are only 10 and their thoughts are not ours!
The kind of answers which might result in the 'definitely not/think carefully about this one' pile are those where the kid expresses a clear unwillingness to come to the school (surprising how often this happens) or shows they are unwilling to be part of a community. Any special needs would be taken into account when listening to answers and it's recognised that some special needs make interviews very hard or unusual answers more likely. Being totally insipid and having nothing to say isn't going to help either, although interviewers know this might be a first interview ever, it can be nerve racking and people shy, and so will be adept in helping to draw shy children out and helping them to give an answer......but then if a child clearly still doesn't have a thought at all about anything, it's difficult to be positive.
I'm sure there are loads of hilarious answers given. They might make us parents cringe when they're given by our child, but interviewers expect 10 year olds to answer as 10 year olds and if everything sounds like an adult answering, it probably is a bit fake.
And I liked the example of the boy saying he'd rather eat shit than play rugby. Unusual to say the word 'shit' in an interview and possibly raised an eyebrow at that moment. But perhaps in the rest of the interview the boy showed he was enthusiastic about other aspects of the school, had other interests himself and came across well. Perhaps he also was a top performer in the exam. These single line comments from the kids we read here are all out of context of everything else they said, their exam performance, references and how competitive a school is to get in.