at least 2.0 (getting about 20/40/60 from norm and 40/80/120 from hard, id call that a fast trainer), 2.5 if youre lucky (thats a very fast trainer). My new youth goalkeeper only has 2.0, but my DC from 2 seasons ago and some bought players had better training rates.
no token youth players usually have 1.0-1.5 which is bad for 18yo.