I would say that the Capt under training flying the Asianna B777 at SFO had lost his link between speed and the throttles. He was converting from the A320.
I fear will will see more of these types of accidents in the future as a whole generation of pilots no longer touch the throttles. The thinking is that we're there to back up the autothrottle-- WRONG. I always view the autothrottle is there to back me up. Not possible if the throttles don't move.
Accidents where non-moving throttles may have been a factor-
Tam3054 at Sao Paolo,
Air Inter at Strasbourg