Yeah... I usually avoid wiki for my science based information
"The Atkins diet is classified as a fad diet. There is only weak evidence supporting its effectiveness in helping achieve sustainable weight loss"
I argue that any diet is a fad diet with the possible exception of CICO because it's the oldest and easiest to "comprehend". If you eat less and exercise more you'll lose weight, right? Anyway... fads or not, diets will only ever be successful if you stick to them.
I call total BS on "weak evidence" supporting sustainable weight loss. As I mentioned, ANY diet that helps you lose weight will not support sustainable weight loss if you go back to eating like a pig.