I appreciate this is a question for Jim, but thought if you are trying to get an idea of how well this diet works then I will post my progress as well, never hurts to have more info than you asked for
Starting Weight 18 Stone 2 Pounds 2/3/09
Week 1 - Lost 14 Pounds new weight 17 Stone 2 Pounds 9/3/09
Week 2 - Lost 4 Pounds new weight 16 Stone 12 Pounds 16/3/09
Week 3 - Lost 4 Pounds new weight 16 Stone 10 Pounds 23/3/09
Week 4 - Lost 2 Pounds new weight 16 Stone 8 Pounds 30/3/09
Week 5 - Lost 2 Pounds new weight 16 Stone 6 Pounds 6/4/09
Week 6 - Lost 2 Pounds new weight 16 Stone 4 Pounds 13/4/09
Week 7 - Lost 2 Pounds new weight 16 Stone 2 Pounds 20/4/09
Week 8 - Lost 4 Pounds new weight 15 Stone 12 Pounds 27/4/09
Week 9 - Lost 3.5 Pounds new weight 15 Stone 8.5 Pounds 3/5/09
Week 10 - Lost 2.5 Pounds new weight 15 Stone 6 Pounds 11/5/09
Week 11 - Lost 1.5 Pounds new weight 15 Stone 4.5 Pounds 18/5/09
Week 12 - Lost 3.5 Pounds new weight 15 Stone 1 Pounds 25/5/09
Total loss of 43 Pounds.
As you can see, I am losing around 2-3 pounds per week, at first I was hoping to lose more than that each week, but now I am convinced that this is a nice pace to lose it at