I did really well in the beginning without exercise. Over the first 2 months or so, I averaged 3-4 pounds a week after the 14 day induction period. Whether that was because this WOE was still new to my system or because I had a fair amount to lose, I don't know. But after that first three months, the loss began to drop significantly. I averaged maybe .5-1 pound a week and would go maybe three weeks without losing a single pound.
This was, of course, discouraging so I chose to join a few others here by following the C25K jogging program. (Keep in mind that I have never jogged in my life, and never had a desire to be a runner!) I am now (4 months since the start) able to jog 3 miles at a time three days a week. I find that on this regimen with the same eating behaviors from 4 months ago, I am back to losing 2-4 pounds a week. I would prefer if I never had to exercise as it's always starts as a chore, but the fact is that I feel better afterward and the continued weight loss provides the incentive I need to stick with it.
Hopefully you can find a physical activity that works for you as well. I would suggest you try things you previously wouldn't have -- I *never* would have picked running in the past, but I'm getting to the point where I miss it when I take too many days off. Best of luck to you.