I don't see why not. Opinions and attitudes aren't nation-specific and the questions seem pretty general to me. Plenty of my UK flist have taken it - they've all come out all socialists. But then the UK is, in general, more left-leazning than the US. But then most of the Americans on my flist have also come out Socialist, so maybe not.

But I have no problems at all calling myself a Socialist, if that's what you're asking. It's what I am, for sure.