Americans know hamburgers, and when it comes to ranking the best quick service restaurant (QSR) burger chain In-N-Out Burger, Five Guys and Whataburger top the list, according to burger brand findings from the 2013 Quick Service Restaurant (QSR) Benchmark Study from Empathica Inc. Despite industry leadership in sales volume, the study revealed low customer satisfaction scores for the “Big 3’—McDonald’s, Burger King and Wendy’s. read more »