Chick-fil-A tops fast food accuracy with 92%, followed by Burger King and McDonald's at 88%. KFC ranks lowest at 81%, but improved since last year. Taco Bell is fastest in drive-thru, averaging 4.3 minutes. Chick-fil-A has longest wait at 8 minutes.
https://www.yahoo.com/lifestyle/fast-food-chains-most-notorious-160815785.html