Yes I have read your message 747Focal, but it is becoming clouded in anti French/European issues that shouldn't be part of this.
I still don't see the problem. We have accepted by operating the 747-400 the concept of having people on the Upper Deck and providing them with slides from the Upper Deck. We are going to test the A380 to see if we can get 33 pairs of people out in 90 seconds from each of 3 doors- nearly 3 seconds a pair, from a similar height. 3 seconds in an emergency situation is a long time. All they have to do is jump and sit. Slides don't choke up- once you are on it it is a non-stop one way journey at the same speed for everybody. Let's leave it to Airbus to see if they can prove their hypothesis.