[NewsyHacker]

I’m surprised to read this, inasmuch as when I briefly lived in Rotterdam (if “capital region” comprises it, too) some years ago, my local acquaintances coached me in where to use the formal, and where to use the informal, and the distinction seemed very much alive.

[brnt]

A Rotterdammer using the polite form is the Dutch equivalent of angels flying out of ones bumhole: I've never seen it.

Joking aside: theres the school version of pioitesse, and the actual version.