Guys,
Having experience on both 737 and A320, and trying to "translate" this to the Boeing guys, I can say that what happened on this accident (speculation so far) is something like disengaging the Auto-throttle on final approach and not moving the TL to idle at flare and landing roll out..
Simple and bizarre like that, so that is why I do not believe that this could happen (still think that something else played a significant role on this accident).
Believe me, the Bus is a very easy airplane. We call it a "no sweat" airplane
(when you get to the hotel after several sectors, you are still smelling good!).