Over the years I've researched and became a guinea pig to many different ways of eating. I enjoy reading the variety of slimming plans that come from Europe. The one I linked above is not new in the least. Dukan's initial fast weight loss in the first week is basically a recycling of Stillman's.
Dr. Dukan's "Attack"
Dr. Stillman's - "Quick Weight Loss"
Today, I started in the first phase "Attack" or "QWL" phase this week. I will concentrate on my eating and do moderate exercise such as biking and the elliptical. I know from past experiences my body experiences major fatigue once I reach ketosis by the third day. I don't want to mess around this time and am following the plan(s) to the letter.