I think you'll find that any RBG team that has a "leader" dishing out commands will be second-rate, at best.
One person can not see the entire game, and command an entire team. You need a team to do so.
You'll find that the better teams communicate heavily. Constant calls of Inc + numbers, or letting the team know they're on the way to defend are crucial. I often find in BG's atm that you'll call "Inc LM 3", and either nobody will come, or 8 people will come. The better teams will communicate so they get the right amount of players to the right locations at the right times.
Team game, Team effort. There's no room for a Leader after the first 30 seconds of a BG.