Airbus 380 arrives in Montreal

While doing my runup at Cedars airport today I looked up and saw what I thought was a low flying airliner flying downwind ready to turn on to final approach on runway 6R in Montreal. I finally realized that it was the 380 doing a tour of Montreal. I qualifies being named an Aluminum Overcast. Being as big as it is it looked very slow - too slow to be lifting all that weight. Even from the ground one can tell that the fuselage is very big. I wondered how big the vortices were and for how long they would be sustained.