Well yes of course, I understand the psychological tricks restaurants use to increase 'perceived value'. That doesn't mean I agree with them though, or that it makes the food any better. Maybe I'm atypical, but for me it actually decreases the value, because I know I will feel stuffed before my plate is empty, and my last memory of eating the food will be that I could hardly stomach any more of it before I stopped eating. This is not even considering the moral objections I have against throwing away perfectly good food, as someone else above me already mentioned as well.