Halo 4 Bumper Jumper?

My friend and I were talking about all the latest Halo 4 videos and what not, and we noticed in the campaign demo when the player used sprint, the meter didn’t go down.
I already that sprint wasn’t an armor ability in the game, but I didn’t think that you’d be able to use both sprint and an armor ability.
My first question is this: will sprinting be like it is in BF3 adn CoD, where sprint is used by depressing the left thumb stick forward?
And my last one: Will there be not only bumper jumper for Halo 4, but other layouts? I know this is a stupid question, but I’d liked to know for sure.
I could’ve missed somethign about this already; and I apologize if this is already common knowledge.