I know it's an old topic but since we bring this on now.. i'll have to say that young players gain way more than 20 /56*/63.
I usually get 30-44 on hard stretching, 70-85 on cardio and over 100 on Match Practice.
Guess your 18 y.o is not a fast trainer but a free academy player.
A fast trainer would take the lead against the scout once they get to 110Q or so.