Robert, that is honestly a rather interesting question you're bringing up.
What is the stall speed of the Concorde?
Some Nasa engineer in a Usenet forum some 10 years ago told me it was in the order of 60 kts, a totally theoretical figure of course... Not sure if it is accurate or not.
The point is that the aerodynamics of the Concorde is different, it does other bad things at low enough speeds, but it hardly stalls as far as I understand.
It is a bit of a technicality... The point is that it did not depart controlled flight as a result of a stall, which would have been a reasonable conclusion for a conventional aircraft given the final maneuvers and the wreckage distribution.