I did the AAM and I think my loss was less that normal that week, but I do know that the following week I made up for it.
You should still lose that week if you weigh your portions out correctly.
Just a tip...don't get too excited or scared about it. It's hardly a meal. More of a taster.
I hear so many people concerned as they are adding food, but remember Cambridge is food. Certainly if you are having the bars by then, it's not even the first time you get to chew.
AAM success is mainly down to your perception of it IMO