I would imagine that Swedish audiences are more respectful and dignified than American audiences, who don't think twice about talking, loudly eating or opening their goddamn phones (what is with people and their stupid phones??) during a movie, as if the film were just background noise for everything else going on in their fascinating lives.
It varies to be honest. Some audiences are perfectly fine. Other times you'll find people who seem to believe that they're at home in their own living room. The most recent horrible cinema going experience I had was oddly enough at my small arthouse theatre where I watched "A Separation". We were only ten people in the theatre, but among those there were to elderly ladies who couldn't shut up for a second. They commented their way through the entire movie. Not in whispers, but talking aloud! My worst "killing" looks passed them completely unnoticed. But something held me back from calling them out telling them right out to shut up.
I just couldn't bring myself to do it. I think it had to do with age, them being far older than me.
I think that's why I agree with Fro who claims that older theatre visitors are the worst in this aspect.
They talk loudly and noone calls them out for it since we're taught to be polite to elderly people.
So I too have my share of horror stories. But this doesn't take away from me that there is a certain magic in the theatre that I never experience as I watch a movie at home. It's the real thing. That's all I can say.