I've been on the plan for 12 weeks and my target date has changed rapidly as of course my last 2 months I didn't loose as much in the first month. Also if you take in unavoidable events when you may loose less, stay the same or gain, then it will obviously change. Also my BF is 5 pounds off his target and his weight has changed from good losses to 1/2lbs and stayed the same, the prediction doesnt allow for that either.