Skol, would you care to back up your assertions with evidence?
I've been checked by some younger than I, some older. I've checked some older than I and some younger.
I'm not aware of any defference towards me for my age, nor have I given any based on age, young or old. I don't believe that any checkers at my current employer would pass Clarrie "coz he's a good bloke."
Whilst what you assert might happen from time to time, to suggest it's the norm to leave it to the poor young know-it-all F/O line drivers to weed out the oldies, seems to me to be a wild generalisation.
Mind you, I
really hope I can reflect on my own perfomance objectively, and know when it's time to hang up my wings.