desitter:
Surface tension tends to keep such debris islands intact.
Water drag and wind are more important. Since the tail was largely submerged it's going to act like a sea-anchor, while lighter debris (such as lifejackets) are going to be exposed to wind.
Therefore, you wouldn't expect them to stay together.
On another note. Bearfoil:
Originally Posted by
bearfoil 
In my experience, FRP has a signature failure in high energy impacts that is unmistakable. It explodes.
I'm still looking for evidence of exploding composites. Erm... nope. Still not found any. (Lucky for me or that Reliant Robin could have gone up like a Ford Pinto.)
Bearfoil, you can't have it both ways. The VS shows that the composites were stronger than the metal lugs and yet you theorise that the spoilers would be atomised on impact and leave no trace.