Well he always puts in all his effort and is willing to play just about any position on the team. That at least shows a determination that not everyplayer has, do you think Alexis Sanchez would move from winger to defender? What even defines a great leader anyway? I don't know Young at all, nor do I know Gerrard or Terry, yet for some reason people fawn over the leadership skills of Gerrard and Terry, but what is it they actually do? We don't know what they say on the pitch, nor what they say behind the scenes.
Why is Keane a good leader? He is an arrogant man with a rotten attitude and a worse temper.
Why is Giggs a good leader? He betrayed his brother and his own family.
Why is Vidic a good leader? Because he is willing to kicked in the head to stop a goal?
Why is Gerrard a good leader? I've heard that he can't even stop his wife from rooting half of Merseyside.
Adams? An alcoholic.
Terry? Controvery followed him everywhere.
Maybe people like Young, maybe the staff and players all respect him, you don't know anything about what he is; only what you've seen and what you've judged. The point being even as I've criticised all the player listed, that doesn't mean I know why they are great leaders or not despite their faults.