The performance adds fuel to McDonald’s revival, after the chain had seen its U.S. sales fall for two years up to the third quarter of 2015 following a series of missteps under former chief executive Don Thompson, who left the world’s biggest restaurant chain last year. “Once upon a time, under previous leadership, it seemed like McDonald’s became a less nimble company where it took a really long time to roll out new products and innovations,” said Morningstar analyst R.J. Hottovy.