don't know if this has been mentioned elsewhere - AB have completed wake vortex testing for 380:
Details of the key elements of the guidance for ICAO Heavy, Medium, and Light aircraft categories:
Vertical Spacing
Vertical spacing in all cases to be the same as for other aircraft
Evidence and data from encounter flight tests at cruise altitude, supported by airborne LIDAR measurements, have demonstrated that the A380 wake characteristics are equivalent to those of the B744 (chosen as the benchmark aircraft) for this phase of flight. Therefore, the current ICAO vertical separations are confirmed to be appropriate for A380 operations.
Horizontal spacing en-route
En-route horizontal spacing to be the same as for other aircraft
Holding
Vertical spacing to be the same as for other aircraft
Approach / Landing
No wake constraint for the A380 as a following aircraft
A380 followed by Heavy = +2nm extra to existing ICAO separation (6 nm absolute distance)
A380 followed by Medium = +3nm extra to existing ICAO criteria (8 nm absolute distance)
A380 followed by Light = +4nm extra to existing ICAO separation criteria (10 nm absolute distance)
Departure following A380
No wake constraint for the A380 as a following aircraft.
Same radar spacing as for Approach / Landing
Or, for time based operations: Heavy = 2 minutes; Medium, Light = 3 minutes