Can Taco Bell Succeed With its Copycat Fast-Food Diet?

With the start of a new year comes resolutions from millions of Americans to lose weight, a Sisyphean task that has kept Weight Watchers and Slim-Fast in business for decades. Now, Taco Bell, the fast-food restaurant owned by Yum! Brands (YUM), has jumped into the fray with a marketing plan that's remarkably similar to Subway's decade-old Jared campaign.