I know I say this every time I cut the carbs out, but it's amazing to me how much my body does not like the refined carbs. In the last 2 days I've lost 3.2 pounds. I know it's all water weight because carbs make me hold onto water (as they do a lot of people). I also know because I feel less bloated and, um, have been making many trips to the restroom throughout the day.
The good news for me is that I haven't even been extreme about it. South Beach Phase 1 knocks out all carbs, including fruit. However, I've had an apple every day for the past two days. Also, I made a pork chop recipe last night that used a little bit of whole wheat flour as a "breading". Also, I put honey in my plain Chobani*. Still fine. I think the lesson for me is, fruit is fine in moderation, even high-glycemic fruit like apples, and a little whole grain here and there is fine, but no refined carbs definitely, and low carb generally.
* Maybe you can eat plain yogurt without anything, but I cannot. I had some yogurts to finish off and honey seemed like a pretty innocuous way to go.