the torn-out hinges
Have not seen any photograph showing this detail. I would assume more damage to the end ribs if the fittings would have been torn off, unless the design is very poorly balanced between composites, metall fittings and fasteners. (which might be because the fittings are optimized for fatigue, and hence very strong in static overload)
torn-off trailing edge
fully agreed, this is a strong indication for an in-flight (or "end-of-flight") damage. And the investigation by the french will for sure find out how it was torn off (upper skin failed in copression/bending, lower skin failed in tension if torn off by an upward acting force)
It is very, very likely, that this item is from MH370. But we should better be sure...
flapperon would have barnacles on it with the appropriate DNA
and other very distinctive bilogical / biochemical evidence. Like type of algae or diatom ar whatever distictive lifeforms existing in the ocean.