If there’s an extra glow to the Golden Arches of McDonald’s these days, you could say it’s because the morning sun is shining all day. Last spring, McDonald’s was reporting “negative guest traffic” as a cause of its 33 percent drop in net income. This year the world’s largest food chain is basking in the glow of positive earnings: U.S. same store sales jumped 5.7 percent in the 4th quarter of 2015, driven by its introduction of all-day breakfast.

A week after McDonald’s report, Dunkin’ Brands CEO Nigel Travis reported a 0.8 percent drop in U.S. same store sales and identified “recently revitalized quick service restaurant brands, which were actively discounting,” as one cause. He specifically denied McDonalds is to blame for the slowdown.