according to the NYT:
"Low-Fat Diet Does Not Cut Health Risks, Study Finds"
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.

thank goodness. now i can go back to eating my fast-food and non-diet coke with peace of mind.