I'm also European, I travel to the United States at least once a year and I have never spent longer than 60 seconds at the US border, and that includes scanning

I'm also European, I travel to the United States at least once a year and I have never spent longer than 60 seconds at the US border, and that includes scanning my fingerprints. The officers doing passport checks have only ever asked fairly reasonable questions such as how long I am staying for, what the purpose of my travel is and occasionally asking about my occupation. However, my (US citizen) wife gets harassed here at the UK border all the time; a couple of months ago she was detained at London Heathrow Airport for several hours by the UK Border Agency for no particular reason.