This was an interesting read, thanks mkenuk. I (native Californian) found myself chiming with the British interpretations. Of course, if these are verbal (not written) remarks, the tone of voice in which they are given may make a great difference in intention. The same goes for anona's example: 'Why not?' delivered very quietly sounds to me like a serious reproof, but I'd have to hear it to know for sure.
Another interesting topic in the nuance of language usage is the expression, 'Bless your heart,' as used by American southerners. It can be a kind remark, but very often it means 'that makes me angry', or, 'what you're doing/saying is idiotic or embarrassing, but I'm too polite to tell you so.'
Let's hear some more!
Best Wishes,
nineoaks
