I remember a DC-9 crashing on take off from Detroit many years back. I believe that was blamed on incorrect flap settings, but the A/C took off and stalled in a nose high attitude resulting in an initial impact with a power pole and then full impact with a bridge. If slat position were to blame, would the 747 have been a greater distance away? And, as with the 747 crash, if it did not have ample runway to use, would it not have ended up in the field just off the end of the runway where the tail parts were found?