Funny you should ask this question, because I've often wondered it myself while surfing around this forum... The little devil that lives in my head is always looking for 'evidence' that this isn't going to work for me, even though it is working.
I wasn't really seriously overweight until high school, but in elementary and junior high I was bigger than other girls. I had a nice, curvy body at the point in time where all the other girls were scrawny from growing. Then in high school, I began dating my husband and went on the pill. I really started to gain weight, but very slowly and steadily. About 15 lbs per year for three or four years. When we started dating in the 10th grade, I weighed 126 lbs and was wearing a pair of size 26 levis (it was the 80's, so I admit they were pretty tight). When we got married, I weighed 205 lbs, my heaviest weight ever. I've gone up and down a little bit, but I can't recall the last time I was under 160... that will be an exciting day for me.

Jenn