This would suggest that they did not stuff the nose down and enter a hi-ROD and so trigger 'sink rate.' They impacted the water 300m from the threshold. This is 600m from the normal touchdown point.
They DID stuff the nose down. In the FDR readout you can see that the ROD briefly reduced when the automatics were disconnected, but immediately after, the ROD went to app 1100'/min.
Thinking about it, it is actually as form of 'art' they were unable to keep the airplane stable but at the same time, were JUST able to avoid a GPWS alert...