Rose Technology used fast-food data from QSR Magazine and SeeLevel to see which establishment has the quickest drive-thru service, and if they got better or worse in the last two years.
An analysis of over 300 locations shows that drive-thru service got slower at Chick-fil-A and Starbucks, whereas chains like Dunkin', Carl's Jr/Hardee's and Taco Bell got considerably faster.
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Via Reddit.