Fast-casual restaurants Chipotle and Starbucks have been delivering eye-popping sales increases in the United States for the better part of two years. In fact, in the second quarter, Chipotle reported a 17.3% same-restaurant sales increase. Starbucks chimed in with a 6% gain for its U.S. restaurants. The losers from the shift in consumer preferences have been traditional full-service restaurants like Brinker International and Darden. However, sales data from the second quarter for the publicly traded full-service restaurants suggests they may not be dead after all. Brian Sozzi reports.