Its funny I was thinking this same thing before I found this thread. Unfortunately I don't have anything profound to add other than I agree with the premise of this thread. I too have over 100lbs to lose. Currently I have my "not fat anymore" by BMI standards which is 145 but my goal is 130 or perhaps even lower. I've never been thin so I'm not even sure what thin will be for me at 5'4".
THanx for this thread and for all that have offered their opinions.