Nice to hear that - I was about to rep Germany as well ;).

Though it's surprising how badly this can go even in close countries such as Switzerland.

I once left feedback such as "this 3h on how to use Powerpoint should only be 30min. It doesn't have a lot of content, and the teacher clearly isn't interested" on a company course (where it was explicitly requested).

I was summarily called into an HR meeting to explain that such direct language was not appropriate.

I did not make it much longer at that company.

As a Belgian I can confirm. The Dutch are considered very blunt. We Flemisch people are more subtle and diplomatic. But in a working environment, it's actually pretty good to just be brutally honest about stuff, even when you step on other peoples toes.