I agree that it is a large gap front-to-back, and it takes getting used to. I think the idea is that in the event of an emergency, you have a lot more stopping power on the brake where it is- by bringing your leg back, you're guaranteed to have the range of motion to push that far down.
Does this make sense when you think about needing to bring your leg back? I don't know. I'm pretty used to it by now.
My bigger complaint is the distance from the non-adjustable pedals to the non-telescoping steering wheel. When I get close enough to the wheel, I'm too close to the brake. Not by much, but a little adjustment in one of those would go a long way for me.