experience
Experience is not always a true judge of capability.
An example?
If a guy has shagged 200 women (ie, is very experienced) does it make him better in bed than someone who has shagged only 10 but studied tantric sex for a few months? No
Does it depend on the individual? Yes
(apologies for introducing gutter level examples, I am clearly sexually frustrated - sorry!)
I have flown with a few pilots approaching government-issued-bus-pass age, some are great, some are not, same goes for those who have only just learnt how to use a razor!
Six