I can't speak for OASC, but in the AFCO's, all interviews, including P2 filter interviews, are conducted from a 'script'. This ensures that each and every interviewee is treated exactly the same regardless of age, experience or anything else. It may seem harsh to the older interviewee, but it does standardise the process. The interviewer may take into account the interviewees age when making his/her notes however, but it isn’t always the just the answer to the question the interviewer is interested in. It’s how the candidate performs to the interview situation, which may include questions he/she wasn’t quite expecting or makes them think that little bit harder.