There was (for once) an interesting programme all about this on Discovery Wings some time back.
Apparently the Russians had been spying on the French for years to get a full set of Concorde blueprints - they were almost successful but couldn't get the wings right.
The plot thickened and thickened up until the TU144 crash which some attribute to the mystery Mirage which the Russian crew had tried to avoid. After that, some say that the French and Russians colluded in covering up the truth!
In the programme the French Minister responsible for aviation at the time walked off the set when the interviewer pushed him on the matter...
According to the programme makers, Concorde was designed with a much higher 'g' tolerance - so would have survived the manoeuvre.