While that article seems reliable there has been a lot of speculation about the actual events in some of the professional pilots forums.
As a non professional but somewhat in the know person I would say that the plane didn't suffer a total hydraulic failure.
The plane in question(A300) has three independent hydraulic systems and it uses ailerons and spoilers(speedbrakes) for roll control. If the damage is restricted to the area shown in the pictures, then only the aileron actuators were damaged and that would propabaly have breached 2 of the 3 hydraulic systems. However those systems have fuses and even if they fail there's the third system which operates spoilers differentially for roll control and elevator.
So my guess is that they still had some roll and elevator control left but no flaps or wheelbrakes. If they indeed had a total hydraulic failure then the flightcrew did the most outstanding feat in landing that plane with that little damage, using only engine thrust and elevator trim for control.
Anyway, here we can see why those "bus drivers" are paid so well and have earned it once again.