OK... here's a first. I am going to have to disagree with you kinnem.
There is no program of instruction that these guys will face where "starvation" is used a means to induce stress. In fact, they go out of their way to make sure you have 3 meals a day. In garrison, they will eat in the chow hall where they move through the line and get two glasses of Gatorade or water (or milk or even chocolate milk!), and plenty of food at each station. They will be expected to eat quickly! but they actually will make sure you clear your plate. In the field, you get more in MRE's than you can eat. It is just not in their interest to underfeed you given the high intensity physical activity you undergo.
Now... I will admit you might find yourself hungry. You may not eat until you feel full. But you will get 3 "squares" a day and you will be given an nominal time to consume them. Sometimes that is sitting in a chow hall or it can be on a forced march but you will have enough to sustain you.
I do agree with the high attrition rates at OCS. See post #84 in this thread where I posted the stats from 2nd increment last summer.
Sampia, so glad to hear your DS is doing well. I remember doing my personal best on the run at OCS also - the "environment" provided by the Sergeant Instructors helps "motivate" you!