Just been watching Fox News - the lady on there announced a few minutes ago that the aircraft 'may have touched down at up to 1,400 feet per second'.
To be fair - their tame aviation expert also said "1400 feet per second" - and then corrected himself to "feet per minute."
Weird to see everything aft of the pressure bulkhead basically gone, while the rest of the fuselage is substantially intact except for post-crash fire damage.
I think I see what physically happened here - tail got low and clipped the seawall, surgically removing the tailcone and empennage. WHY that happened - exactly - we shall see.
Happy the survival rate seems quite high - so far.