As a dancer I can say that Highland dance is HORRIBLY difficult if the tempo is not fast enough, but that may be because it requires you to balance demi-point which is impossible for more than about half a second. However if somone has come to play live for you then I think it very rude to look insulted if they don't play a tune exactly as you like it. Apparently a lot of high level Irish dancers are very unplesant to play for, even the 10 year olds but I can't really comment, this is herasy picked up from friends who do Irish dance.