EasyE,
I have personally known quite a few people who "did Atkins", lost weight, starting eating carbs again and regained the weight, plus some, fairly rapidly. And the one thing they had in common was they did not count their calories either during Atkins or after...so rather than dealing with the basic fact that they went from eating at a calorie deficit to eating at a surplus, they all say the same thing "When I went off Atkins I gained a lot of weight eating carbs." And yes, it's b.s.
Look at it this way, a single biscuit at my favorite restaurant is 180 calories. If I were doing Atkins I would eat some eggs, some bacon and maybe some cheese for breakfast. Now say I decide to go off Atkins and I eat those same eggs, bacon and cheese, but I add that biscuit...and of course it needs a little butter and jelly. Say I toss in a small glass of o.j. I've just added about 300 calories to that single meal...but I'm not counting calories so I don't realize it. Then, instead of a tuna salad on romaine for lunch, since I'm not "doing Atkins" anymore, I add 2 slices of bread and make it a sandwich. There goes another 100 extra cals. And, since I'm no longer restricting my carbs, instead of grilled chicken and broccoli for dinner, I decide to add a small bowl of pasta - or have my chicken fried or covered in bar-b-que sauce instead of grilled...then I go for dessert, but instead of a small bowl of blueberries, I opt for a small wedge of cake, or a couple of cookies....seemingly small additions of carbs during the day, but adding up to nearly 1000 additional calories. How long do you think it's going to take for me to start gaining weight again? And it it the fact that I've "reintroduced carbs" or the fact that I'm now simply eating more food - of any type - than I'm burning off?
I'm not trying to be a smartass here....I "did" Atkins - to the letter of the book - I reintroduced carbs - I continued to lose weight at the exact same rate - because I was counting calories and maintained the same deficit.
If this whole carb counting thing is working for you, I'm not trying to say "do or don't do"....I'm just saying it's based on psuedo-science and has nothing to do with weight loss.