Here is an small-size survey conducted in eight coffee shops in the Boston area. Researchers want to know how long it took men and women to be served. The results:
men get their coffee 20 seconds earlier than women. (There is also evidence that black people wait longer than white people, the young wait longer than the old, and the ugly wait longer than the beautiful. But these effects are statistically not as persuasive.)Not sure if this is because men are more decisive orderer than women, or coffee shops' staff feel more implicit psychological pressure to meet the needs of the male customers.