While the internals of this study are interesting the rankings are questionable.
Chick-fil-A deserves the top spot but McDonald's does not deserve such a low ranking.
Panera is better than McDonald's? I enjoy Panera's tuna salad sandwich but you
need a calendar to time their drive-thru service.
Dairy Queen has a better drive-thru than McDonald's? Give me a break.
The 2020 QSR® Drive-Thru Study - QSR mag