Tricky question ad it would depend on the player and the team you are using. Statistically, the player will fail though.
If playing in lower divisions trying to climb the ladder in the league system, its usless getting hot prospects that young as when he is ready for action , you have already got 2 divisions higher up and he will still be poor.
Eg. My Anchor man (age of 14) is valued 40k and still is better than my 26 year old Anchor man - just thinking if to sign him for real or just exploit that his wage of 40 E p/w.