A Diet Too Extreme?

I came across this diet by accident, when searching for "20 pound weight loss" on Google's search engine.

Madonna's Trainer: How to lose 20 Pounds in 6 Weeks

I am curious whether the total calories equals 1200 a day. Seems like they may barely reach it. Depending on the person's starting weight, this could be an okay temporary diet, I think. My target is only 1200 calories a day, too, which is considered a safe amount given my current size. One reason I could not do this diet, is I need more diversity in my food. I think doing this diet for six weeks would be so boring for my tongue and stomach.

There is a lot of back and forth in the comments under the article at the link above that are somewhat entertaining.