takeoff53, the 380 is not like other big birds. It is slower (and in the way!) of other large aircrafts. Everybody has the mis-conception that because it is big it has to be fast. It approaches 20 kts slower than a 777. So not only does the controller need 6 nm wake seperation behind it, but he also needs to add some space for just about every other heavy jet that will catch-up on approach.