Well if you've read the book, then you know that Atkins is NOT *no* carb. It's *low* carb. And staying below 20 g is only the very first phase of it. Many people are following Atkins and eating 50, 60, even 100 g of carbs a day. What carbs they choose to eat makes all the difference though.

I don't know anything about South Beach, other than that in the first chapter of the book they explicitly say that it is not a low carb diet...

I wouldn't waste my time trying to correct people who clearly don't know what they're talking about. I'd just say "have you read the book? no? well, let me know when you do and we can talk then". Other than that... does it really matter what "name" other people are giving to how you're eating? You know what you're doing, and that you're doing it right, and that it's working. I'd just "smile and nod" to those who insist on pestering you with misinformation.

Wynter