McDonald's may not be Mcloving the latest customer trends. Despite reporting better than expected US same store sales growth of 2.4% for the third quarter, the fast food giant CEO Chris Kempinski is still warning of a pullback in spending from lowincome diners even though it's still offering extra value meals which accounted for 30% of US transactions. And he's not the only one sounding the alarm.Mediterranean restaurant chain Cava did cut its fullear forecast for same store sales growth to a range of 3 to ...