For me really its the Netherlands. I have visited the Amsterdam Arena + Ajax academy, its a hugely impressive system. First they seem to formalise the coaching of football at a younger age. But what seems more unique is that they start with coaching, not playing. They spend years with the youngsters, getting them to perfect skill with the ball, close control really.
All other countries is more about playing in a team, in a league - competitive. Of course you can see differences between nations, in Italia players who understand the mechanics of team play and tactics excell, in Spain you see alot of very fast players produced, while in England you see more physically tough players come through. All these have in common a kind of survival of the fittest from the youth leagues. I think the Dutch way is the only way in the modern world to ensure alot of technically excellent players are produced. Because it focuses players on thier technique and perfects it before they have to develop other attributes to be better than other players.
You really need to go and visit Claire Fontaine the next time you are in France.. if that impressed you the Claire Fontaine has much much more than this and piss all over any football academy in the world ..
from wiki instead of translating it from FFF website
Making the player’s movements faster and better
Linking movements efficiently and wisely
Using the weaker foot
Weaknesses in the player’s game
Psychological factors (sports personality tests)
Medical factors
Physical tests (beep test)
Technical skills
Skill training (juggling the ball, running with the ball, dribbling, kicking, passing and ball control)
Tactical (to help the ball carrier, to get the ball back, to offer support, to pass the ball and follow the pass, positioning and the movement into space