I’ve lost 50 lbs. since August of 2001 while following no diet plan at all. It’s all about exercise.
Weight Watchers…
Lost a little over 50 lbs since last August. I’m now at my goal weight and holding. I didn’t really exercise much more, or much at all to begin with. Just bowled a lot. And now that I’m at goal I’m doing crunches, push ups, and a little bit of free weights so I can tone up whatever’s left.
http://fff.fathom.org/pages/opalcat/weightloss-12weeks-small.gif
I’ve lost 44lbs in the last 12 weeks following my weight loss surgery. This was not gastric bypass, but something different, btw.
Another 56lbs to go and I’ll be at goal 
I started a strict reducing diet on November 1st last year. I have no idea how much weight I’ve lost … but I’ve gone from a 52" to a 44" waist so far, and seem to be able to keep it up. At this rate, I could be a relatively normal shape by this time next year.