I've just noticed that I'm prejudiced against American sudoku-solvers. I noticed that while I was writing about the national sudoku championship, I was automatically assuming that American sudoku competitions would be really easy to win for someone from this country, because we do much more complicated and difficult sudokus than them as a matter of course.
This prejudice is based on crosswords, I think - I have absolutely no idea how difficult the average sudoku puzzle is in the USA and no reason at all to assume that it's easier than the ones in newspapers over here. So I apologise to any American sudoku-solving mind-readers who were offended by what I was subconsciously thinking. I'm really sorry about that.