chrisN -"you mean the impact trauma at the sea surface/ditching" - absolutely, in my book. I cannot see any way that a wing section could hit the seabed hard enough to cause that damage. I might surmise that a wing section, if tumbled along the sea bed by strong currents, could be extensivley damaged, but since it appears to lie near the other debris I think that scenario is unlikley.
As BEA proposed, some impact.