I think you're right in one sense, in that there is too much emphasis put on results too early (certainly I feel this s the case over here). On the other hand though, players do have to be "great" by 16 (depending on your definition of great of course). Whilst there is a second window of opportunity between 16-18(ish) to develop coordination chain based tasks, it is much less effective than the earlier window (up to around 12-13) - so the groundwork must be done.
So for me, great in terms of tec/tac/phys/mental skills by 16 or thereabouts is essential, great in terms of results starts at 16.
Don't be upset by the results you didn't get from the work you didn't do...
talkcoaching on wordpress, come check it out :)