Watch out, Wawa, there's a new leader of the C-store pack. Midwest fuel stop Kwik Trip leapfrogged the competition to top the annual American Customer Satisfaction Index rankings of US convenience stores. The Wisconsin-based company improved its score by six points from last year to pull ahead of regional favorites like Wawa , Sheetz, QuikTrip (unrelated), and Buc-ee's. "The brands rising to the top are doing more than just selling coffee and snacks. They're building communities inside their