Galaxy -
I've done my share of engine overhauls and hot sections...I'll bet you $100 you can't find one guy on Earth who's going to prove that reduced thrust departures (for two minutes) is gong to save more in engine overhaul costs then say 5000 hours of running at max cruise thrust at altitude.
I might also add that more time on the runway, gives the plane more of a chance to pick up FOD...food for thought considering the Concord was over gross...she might have missed that chunk of metal if she had been lighter...