More info for the curious (or bored) LOL
"In 1988, the surgeon general, C. Everett Koop, proclaimed ice cream to a be public-health menace right up there with cigarettes. Alluding to his offices famous 1964 report on the perils of smoking, Dr. Koop announced that the American diet was a problem of comparable magnitude, chiefly because of the high-fat foods that were causing coronary heart disease and other deadly ailments.
He introduced his report with these words: The depth of the science base underlying its findings is even more impressive than that for tobacco and health in 1964.
That was a ludicrous statement, as Gary Taubes demonstrates in his new book meticulously debunking diet myths, Good Calories, Bad Calories (Knopf, 2007). 
The notion that fatty foods shorten your life began as a hypothesis based on dubious assumptions and data; when scientists tried to confirm it they failed repeatedly. The evidence against Häagen-Dazs was nothing like the evidence against Marlboros. 
http://www.nytimes.com/2007/10/09/science/09tier.html?_r=1
"...a small but growing minority of establishment researchers have come to take seriously what the low-carb-diet doctors have been saying all along. Walter Willett, chairman of the department of nutrition at the Harvard School of Public Health, may be the most visible proponent of testing this heretic hypothesis. Willett is the de facto spokesman of the longest-running, most comprehensive diet and health studies ever performed, which have already cost upward of $100 million and include data on nearly 300,000 individuals. Those data, says Willett, clearly contradict the low-fat-is-good-health message ''and 
the idea that all fat is bad for you; the exclusive focus on adverse effects of fat may have contributed to the obesity epidemic.'' 
These researchers point out that there are plenty of reasons to suggest that the low-fat-is-good-health hypothesis has now effectively failed the test of time. In particular, that we are in the midst of an obesity epidemic that started around the early 1980's, and that this was coincident with the rise of the low-fat dogma. (Type 2 diabetes, the most common form of the disease, also rose significantly through this period.) They say that low-fat weight-loss diets have proved in clinical trials and real life to be dismal failures, and that on top of it all, the percentage of fat in the American diet has been decreasing for two decades. Our cholesterol levels have been declining, and we have been smoking less, and yet the incidence of heart disease has not declined as would be expected. ''That is very disconcerting,'' Willett says. ''It suggests that something else bad is happening.''"
http://www.nytimes.com/2002/07/07/magazine/what-if-it-s-all-been-a-big-fat-lie.html?pagewanted=2
"The largest study ever to ask whether a low-fat diet reduces the risk of getting cancer or heart disease has found that the diet has no effect.
The $415 million federal study involved nearly 49,000 women ages 50 to 79 who were followed for eight years. In the end, those assigned to a low-fat diet had the same rates of breast cancer, colon cancer, heart attacks and strokes as those who ate whatever they pleased, researchers are reporting today.
These studies are revolutionary, said Dr. Jules Hirsch, physician in chief emeritus at Rockefeller University in New York City, who has spent a lifetime studying the effects of diets on weight and health. They should put a stop to this era of thinking that we have all the information we need to change the whole national diet and make everybody healthy. "
http://tierneylab.blogs.nytimes.com/2007/03/08/the-low-fat-diet-flunks-another-test/
And here is a great analysis of one of the latest "fat is bad" studies showing the junk science involved
http://www.proteinpower.com/drmike/lipid-hypothesis/saturated-fat-study-sucks/