There is no answer to this question, because it's different for everyone and depends on the amount of carbs you choose to consume. If you comply with the diet 100%, including exercise and all other aspects of the PB, you can expect results depending on your amount of carbs, following the carbohydrate curve. If you're overweight, your results should look something like this. People with a healthy weight will burn fat more slowly:
0-50 carbs a day -- Usually about 2 pounds per week.
50-100 carbs a day -- Usually about 1 pound per week.
100-150 carbs a day -- No weight loss or gain.
150-200 carbs a day -- Slow weight gain.
But note that during your first few weeks, you're going to lose a lot more weight than expected. This is the loss of water weight. But that's not really a bad thing. I lost five pounds in just the first three days from the loss of water weight.