You're right Jeff. I found some other reports about the study and they said it was all MacD's.
Here is some other info from Dr. R. addressing additional causes of obesity.


http://news-service.stanford.edu/news/2004/october6/med-robinson-106.html

In the "I wonder" category. Many of us here are obese. We all know how to lose weight and keep it off but we don't. Most of us are waiting for a magic pill to do it for us hence the rage for oatmeal, hoodia or even risky prescription drugs - whatever the latest weight loss craze is. I for one rarely eat MacDonald's type fast food - it makes me ill for days. But I do prefer to nuke a frozen meal or open a can. I hate cooking.
Every fat person I know wants his/her children to grow up thin but does nothing to change the food choices available at home, cook healthy meals or join in physical activities with their children. What makes us so blind to the truth?