Are they kidding me with the Taco Bell diet?

Subway had great success using Jared to paint its subs as a healthier alternative to fast food that makes you incredibly fat. Taco Bell is trying to get into the act with the "Drive-Thru Diet" campaign (from Draftfcb and R/GA) to coincide with the New Year's resolution season. The TV spot above shows a woman named Christine Dougherty, who apparently dropped 54 pounds by eating low-fat offerings from Taco Bell's "fresco" menu. When I first saw it, I thought it was a Saturday Night Live parody.