Well, that is a range of responses. Let's make the question more specific.
Say a B 757 was approaching the circuit area, still at high speed, and the pilot had a short blackout. He woke up to discover he had pushed the throttles fully forward and the plane was doing 460 knots, banked at an angle of 80 degrees. Knowing that the plane will be dropping fast, and scared that there might be a plane just below him, the pilot wants to level the wings as fast as possible. Bearing in mind that spoilers will not be involved, how long will it take to get the wings level?
It seems this is not just a question of maximum roll rate that can be achieved; some inertia must be overcome getting the roll started.