One such critic is filmmaker Sosa Whaley, who is making her own documentary in response to Spurlock. She also ate every meal at McDonald's for 30 days, but while attempting to lose weight. She recently finished her 30 days and reports that she achieved her goal of losing 10 pounds. Her online diary can be found here.
I'm sympathetic to the point she is trying to make, and I agree that McDonald's is unfairly singled out. I doubt their food is much less healthy than the food at more expensive restaurants (many of which do not publish their nutrition information). Still, obesity is a real problem, and McDonald's isn't' doing much to help. I'm not sorry to see the Supersize option go away...I never understood how someone could eat that many fries anyway.