[larsiusprime]

"Bokmål and Nynorsk are mutually intelligible"

Maybe I'm just an idiot, but I contest this :) I have an easier time understanding spoken Swedish (and written Danish) than Nynorsk. I think unless you grew up in an area with a dialect very similar to it, or had it drilled into your head in school, it's basically a foreign language.

Context: I speak Bøkmål and Trøndersk (for you non-Norwegians, that's the regional dialect in the greater Trondheim area), and was raised primarily abroad, though we primarily spoke Norwegian at home.

[vintermann]

No one really speaks Nynorsk (or Bokmål for that matter), they write Nynorsk and speak dialects. Though it's true that if you come across a dialect that you don't understand at all, it's likely that they write Nynorsk as well.

Trøndelag used to be a Nynorsk core area, by the way. Around 1940, half the population there used Nynorsk.