Imagine what is the most tired that you have felt in your whole life, add to that the most stress you have felt at one time. On top of this you are tired because even if you have 7 hours of sleep you have to wake up to pull hall CQ runner or fire guard duty.
Add to this one very senior drill sergeant, who will definitely be a combat veteran, and two hyperactive and borderline sadistic assistant drill sergeants, who will probably be combat veterans too. Neither of these three men will speak to you for at least 2 weeks or so. Instead they will bark at you. They won't miss any of your screw ups, their attention to detail is fantastic, almost inhuman.
These three men will break you down without laying a finger on you, both physically and psychologically. Then they'll build you up as they are trained to. After sometime around the 4-5 week mark, unless you are a complete idiot, they will start speaking to you almost as if you are a fellow human being.
If you are still there by week 7 then you'll make it. If your platoon is ahead in the company competitions, he may even let you guys order pizza and watch TV on Sunday evenings.
BTW, I am not exaggerating. I know that the Army tried to crank down the psychological hazing, but it is still there. I also know that since Iraq started basic training has been modified to include realistic urban training, instead of the open field/woods training that we all received in the early 90's.
The other thing that is different is a shift in the old mentality of technicians v. combat soldiers. During the 90's there was a mentality between us techs that what it was important was for us to know our jobs, not to play soldiers. Why? Because we thought we would always have grunts around to protect us.
The Marines on the other hand are first riflemen, then technicians. It's a service culture thing, which is why it is taking an Army-wide effort to combat it.
Now the Army has to figure out a way to get into the heads of soldiers in non combat branches that they are first soldiers, then technicians or whatever it is they do.