hi, I agree with Boo, it depends, everyone seems to be different. I lost 10lbs in my 1st week, then it slowed right down and now i just seem to be stuck this week I've lost 23lbs all together and Ive been on CD SS for 4 weeks and 2 days!
Yes, the average is a stone a month. First week losses are usually higher and loss settles to 3 - 4 lbs per week.
Some weeks you may see little or no loss but get inch loss. On those weeks its important to see the bigger picture and your overall losses.
Some people lose 1-2 lbs one week, then 5-6 lbs the week after (and that continues) so they lose the same amount on average, but not the same each week (if that makes sense)