Seven pounds in six weeks is amazing, especially considering how much muscle you must be adding. I think maybe the shirt you're wearing in the photos makes it hard for us to tell or something.

I've switched plans, myself - all the fat one eats in Atkins wasn't sitting well in my stomach. I'm trying to follow the Zone, and feel way, way better. This change was key for me to crank up the cardio (though I do need to add the lifting back in a time or two per week). I think I really needed it.