We I have lost 13lbs in my first 2 weeks and my size 20 clothes have gone from indecently tight to sadly saggy already! Deffo not ready for an 18 yet, probably not for another stone/stone and a half. Quite enjoying the feeling of not having to struggle into my jeans and do lunges to loosen them up a bit lol!
I think that everyone is different though, a lot depends on your height and where you carry your weight. My weight clings to my bum/hips/thighs.