Anecdotally, it's not really an issue. I've never seen a bus hindered by EVs, and honestly most people don't even tend to use them anyway.

Yeah, I can’t get my head around that. Why do so many EVs sit in traffic when they don’t have to?

I mean, I don't live in the biggest city in Norway (Stavanger), but the places there are bus lanes tend not to be the places with the worst traffic problems. And there are roundabouts everywhere, with very few traffic lights, so traffic flows pretty well overall.