Aside from George Washington, the surprises were correct in my case. Marc Chagall was born Moishe Chagall in Belarus. J.R.R. Tolkien was born in southern Africa. Et cetera.
Some occasional errors aside, I think it's a really impressive presentation of data and it makes me rethink some assumptions about the way the world works - Chagall is "French" and Tolkien is "British", "English" even....