Could the engine positioning also have had anything to do with it ??? By that I mean that them being where they are, there is less chance of them sucking in any snow and ice on take off / landing, as I imagine they spend alot of their time on contaminated runways, (compared to other carriers) thereby reducing the potential for damage ???
Just a thought.
"She Rolls, 45 knots, 90, 135, nose comes up to 20 degrees, she's airborne - She flies, Concorde Flies"