Thank you for all your nice comments! To answer your questions:

Deplaning wasn't done freely but with people getting off depending on which group they belonged to. Therefore it is difficult to say if the deplaning process takes longer, it didn't in my opinion.

I noticed that the curvature was different, and the plane was more quiet. Otherwise it was hard to get a sense of how big the aircraft is, I wish it would have been possible to move around a bit to get the feel of it..

I don't know which terminal the A380 will depart from in the future, I guess the people over in the LH forum wil know better what the FRA plans are. As to which plane is faster I don't know either. Strange that we overtook the B747 as we were supposed to be flying slowly.