This article is part of a multi-part story on Yum! Brands' newest marketing strategies. See more coverage here.
Taco Bell, the 5,195-unit chain that pioneered the quick-service Mexican segment, had achieved some same-store sales momentum through the end of fiscal 2010, notching gains of 1 percent, 3 percent and 4 percent, respectively, in quarters two through four.
Then on Jan. 19, the law firm of Bea