From my time on OASC I can assure you that while the Board members do indeed follow the same interview format for each candidate, in their pre-interview preparation they do identify which parts of a persons life they are going to find more productive. For the 30-year old - civilian or Service - the schooldays will be covered very quickly! As has been said, it the overall performance that counts - especially in the second half of the interview when they are probing motivation, confidence and determination, amongst other things.