I started Weight Watchers 6 weeks ago and I have lost over 18 pounds already. I am not dieting specifically for my upcoming trip to WDW, but I am excited to be going after/while losing my excess weight. I hope to lose a lot more! (before and after my trip in two weeks)
Just wanted to point out that "32" is certainly attainable in a healthy way by losing 2 pounds a week for 16 weeks. Your advice to lose "15" is also just as attainable and safe while only losing 1 pound a week. I think there is a good range of what is a healthy way or amount to lose. For the last 6 weeks I have lost more than 2 pounds a week, and have done it in a very healthy and sustainable way. I think it just depends on your body, how much fat you have to lose, etc. I mean, if you only have 15 to lose, it's actually much harder to lose those 15 pounds, than losing 15 if you are actually say, 60 pounds overweight. JMHO.
Good luck everyone!