Thanks Deano.
I ask because it has so far been reported that whatever happened, started "immediately after" flaps 15 was selected. Wether this "immediately after" means right after the handle was moved, or after the flaps had moved is not clear.
If it was at flap handle movement the pitch ocsillations started, then it starts to point at something entirely different, than what has been speculated on so far.
If, as reported, the AP was engaged at impact and both stick shaker and pusher was active, then a technical malfunction becomes more of a possibilty.