Restaurant Brands, the parent company of several fast-food chains, has reported first-quarter sales that exceeded expectations. Despite this, the company's shares have fallen, and its performance is being compared to that of other industry giants, such as McDonald's and Chipotle, which have also reported strong first-quarter sales. The company is set to report its second-quarter results in August, with some outlets questioning whether its recent performance will be enough to change its overall turnaround narrative.