Sometimes, it's not about the numbers. The leadership and enthusiasm that he displays can't be shown in a box score. He steps it up and makes everyone around him better. He's like a mushroom in Super Mario Brothers. You don't NEED it, but it sure as shit don't hurt.
But Rex Hudler had a lot of emotion and was a leader, did that make him a great player? I'm not comparing the 2 in any way, but Jeter has had the opportunity to play on great teams and with other great players. Leadership is easy when you are surrounded by other all stars. Last year, Pudge Rodriquez was a "leader" and helped the Marlins win the World Series. This year he was a "leader" and "mentor" for the Tigers and they won 70 games. Did his leadership skills just disappear in a year? It's hard to measure these types of things.