As C. has so kindly pointed out, "You'll never be that 30 year old girl again."
Right now, I'm in week 8 and have lost 8 1/2 lbs. I know it's coming off, but I'm basically doing what I did back then: following the plan, minor splurge but still using my extra points and nothing more, exercising 4-5 times a week a min. of 45 minutes doing low-impact aerobics. I'm lucky to 1/2 lb off each week now.
As the WW instructor said, "If you lost 1/2 lbs every week for a year, you'd lose 26 lbs." Err, yes, but back when I was younger, I'd do that in about 3-4 months!
So for all your 30 year old girls out there, get it off now and keep it off. From what my 50 year old friends say, it only gets worse.