Nameless Bear in mind they aren't one age group.
The youngsters around the squad cover 3 groups I think (Samuel is 3 years ahead of Novacovic) , but you are right it's unlikely we'll get a dozen of this group making 100 appearances for the club. But it's happened at other clubs and we need to give as many of them a chance as possible.
Besides, until you give the promising ones a run in the team you don't know which ones'll make it. Even if they aren't a success it doesn't mean they won't be after some more development. Not that I'm advocating an entire team of them. But having a few on the bench at all times and giving them minutes regularly is likely to pay off for at least a couple.