Which fast food joint gets you through the drive-thru fastest? A market research agency measured ten fast food chains over nearly 1,500 stores and found that KFC gets you through the drive-thru fastest. Taco Bell has the second-fastest drive-thru, followed by Hardee’s. As far as order accuracy, Chick-Fil-A came in at number one with McDonald’s and Arby’s rounding out the top three. Inaccurate orders at the drive-thru were found to cost the average restaurant around $94,000 a year!