Pictures of burn marks on the grass show the Concorde veered left well before the strip and EDS did leave out a spacer. The A/C was overweight with extra baggage unwaid, took off from an rough area of the runway due for repair and an 11 knot tailwind.
Concorde has had over 59 tyre bursts causing 3 major wing damage accidents (the worst JFK) and various incidents including engine ingestion.
Air France and BA ignored a safety report including one of recommending including lining the fuel tanks. Concorde only made a profit for a few short months in it life and lost money from day one.
The metal strip in question is malleable to any shape (tyre "cut") and has not been tested for tyre residue or marking, and there has not been any picture included marking/scraping the runway.
Interesting is Germany had an "undisclosed" payout shortly after the crash for their victims. I hope Continental Airlines keeps a vigil on this one, as some players are good at massaging the truth.