Yes, you will lose a stone a month. That is pretty much a guarantee IF you stick to it. So, you're well on track aren't you? next week you will probably be looking at a 4 or 5 lb loss and then you'll have done your first stone in week 3 I should think.
How much do you weigh and how tall are you? This all has an impact.
Try and stick with it. I really did find it mentally very hard. At one point I was lining up chocolate bars in my kitchen and inwardly screaming at myself as I was so desperate to eat them. Another time I ate a chocolate bar in chunks, spitting out every mouthful. Other times I would prowl around my house as my brain screamed at me to 'just have a cake ' ...
How I overcame this I can't really say. My desire to succeed was stronger than my fear of failing and I just KNEW that this time I had to do it. In May 2011 I was actually 15 stone 2lbs so in total I have lost 6 stone. I managed to get to 12 stone ish last November and then just twatted about losing half a stone here and there. It wasn't until late June of this year that I suddenly thought... now! do it now! So I did.
The rewards are worth it. I have so many amazing clothes in size 8, I put them on and can't quite believe that I did it. Or I catch sight of myself in a mirror and do a double take. I know that every hour seems like about 4 years on this diet but keep with it - don't waste your hard work so far by eating 'just one biscuit' or 'just one bit of chicken '.. the shops will still sell food when you're done with this diet.
If you want further support just PM me and I can point you in the direction of a very good thread that I might just happen to be the author of some place else 