Hi Inaspin,
I bow to your personal superior knowledge, but, as you point out, it still does not negate the fact that you stand a far better chance of getting trained as a pilot in the Navy as an 18 year old DE then you do in the RAF. You are not in so much competition from other 18 year olds for just a very few places.
Having said that, my son, at 19, was the youngest at his FAT and the majority did seem to be graduates. However, he was mixed in with potential Army pilots as well and they may have a similar attitude to the RAF.
The Bearded Wrinkly