I got 0 hours notice -that's fairly common, in the US. Usually, you aren't even allowed to go to your desk, and collect your stuff. You have to schedule an appointment to come back, after work hours, and be escorted there by a security guard.

I (and my team) already knew it was coming. The writing was on the wall, and we had our affairs in order. My Japanese manager appreciated it. I think the American HR manager was a bit disappointed that there wasn't much of an opportunity for the casual bullying and shaming that they do, in these circumstances. The last HR manager was OK. I had zero respect for his predecessor.

HR had the highest turnover of any department in the company. I tended to have a somewhat adversarial relationship with most of the HR managers, but the one that I respected most was fired in an explosion, more than twenty years ago, and now manages a much more prestigious organization. I sincerely wish her well, and she has my respect; little as I'm sure that means to her.

In Marketing and Sales organizations, it's common for people to be walked out the door, immediately after handing in their resignation.