No yes or no straight answe I think. Sometimes I have binged on syns and still lost, other times I have gained. Limit the damage by sticking to plan and eating as much speed food as you can. Dropping syns might cause weight loss to slow down? Your body might hold on thinking it is in a fast? No expert but I'd just write it off because if you mess with the plan to compensate for it, you might make things worse for yourself.