CANTON, Mass., Feb. 7, 2012 /PRNewswire/— In the highly competitive U.S. coffee market, Dunkin’ Donuts is once again distinguished for brewing a superior guest experience. For the sixth straight year, Dunkin’ Donuts, America’s all-day, everyday stop for coffee and baked goods, has been recognized by the Brand Keys Customer Loyalty Engagement Index as number one in customer loyalty in the coffee category.
The 16th annual national survey conducted by brand loyalty and....