I started a discussion over on the Fantasy Faction forum about people referring to works as “very American” or “very British”. I can tell vocabulary and spelling difference and obviously geographic or cultural references. But beyond that, I personally haven’t noticed any particular trends or styles that would make me say “aha! This author is from Britain!” or “This is a very American novel”. Maybe it’s because I read predominantly fantasies that have settings reminiscent of medieval England. I’m not sure. But I am curious.
From the discussion on the forum, many people have noticed trends that they can’t quite define but can recognize. So, I want to see how many people feel they can tell the difference. I’d also love to see an experiment using sample pieces from authors from different countries to let readers guess their nationalities (much like Teresa Frohock’s Gender Bending contest).