Fast-food chains like KFC and Arby's are fixing a big customer service problem -- and it's paying off

@chickfila on Instagram Restaurant chains are finally realizing that it pays to be polite. Last year, Chick-fil-A beat out all other fast-food chains in the US in terms of per unit sales, averaging nearly $4 million in sales per restaurant.  The reason for Chick-fil-A's success? According to analysts, it's in part to do with superior customer service. And other restaurant chains have taken notice.  "[Customer service] is absolutely critical,” Arby's CEO Paul Brown told Business Insider on T...