Having worked in a (now defunct) US co in West-EU I can say it’s a subtle blend of the two. The layoff was announced, shortly after a few people received a call by HR, were escorted to their desk by security and had to turn in all company belongings on the spot. They were not allowed to touch a computer or telephone and were then escorted out of the premises. Afterwards, we learned that they had received a severance package that met local rules.

Most of my colleagues were shocked by the treatment. Moral took a dive after that.