You didn't use ''difference maker'' title for these player in your first post

I agree with you if you meant difference makers. Though how many teams have this kind of player in their roster, almost half of them. I can't see star players in every roster. Some have few that they are lucky, some have one that they depend on that player too much and some have no player who can change the destiny that they look for a miracle. So it is not about age but the quality of player and his winner character.
Young players can make serious impacts but are they be able to run the things on their own, it is doubtful. If they manage to be that effective then they appear as phenomena players.