Olive oil
Using the forecast wind speeds on the first leg prior to waypoint change there would have been a tailwind component of 9.2 kts at the surface and 24.5 kts at 2000 ft. The average groundspeed between the ATC fix leaving the CTZ to impact was 158 kts with a groundspeed at impact of the order of 150 kts.
Boeing calculated from the SuperTANS data, evidence of tracks on the ground and wind speed that the aircraft groundspeed was 162.8 kts with a heading of 017 degrees True. Airspeed immediately prior to impact was approximately 135 kts.