I just wanted to say how I have wondered and thought the same as you on the following paragraph
I want to tell you why this is a good thing. First of all, if you are eating the starvation calories you would need to eat to lose one hundred pounds in six months your metabolism would be shredded by the time it was over. The minute you stopped and tried to "maintain" you'd really be in trouble -- you might have to stay at six hundred for a year after that, and keep slowly adding calories, and be stuck for the rest of your life eating eight or nine hundred "maintenance" . Besides being trapped at a much lower metabolism, your nutrition would have to suck over time if you had to live that way forever.
I was trying to tell the nutritionalist at my pre-med this and that I didn't want my metabolism to virtually pack up (I have problems anyway as I have hypothyroidism badly) - so whilst I'm wanting to lose the weight - I want to do it on a healthy, tasty and varied diet - not just vegetables or salad.
I'm currently on day six of a Clear liquids only - my op is on Tuesday, and then only another two weeks before I can start on soft food... (I could actually eat my dog at the moment I'm so hungry) ;-D
The nutritionalist told me that your body tends to stabilize weight wise and that its a case of eating healthily for the rest of your life ! Like hell, I'm determined to have a little portion of rice and curry or lasagne once a week - assuming I can tolerate it.