Paul: Having gone though a lot of military training myself I would note that it was excellent and every bit of it was DI [direct instruction]. Of course I didn't think much of it at the time but still it's amazing what it accomplishes in very short order.
Another point to ponder is the impact of military culture on the whole training system. From day one you're stripped of your individualism and made part of a group. It doesn't take long before your motivations are all about not letting your group down. You might even say that the last bit of remaining 'identity' that you have is your specialties and rank.
Powerful motivation, no fluff, intense focus, and high expectations, when brewed, create a potent drink. If all that doesn't work, there's the bad ass drill instructor/Master Chief/Master Sargent to provide 'direction'.
All of you.
Drop whatever you're doing right now.
Go read Work Hard. Be Nice.