I also sailing and follow sailing very closely, and some of this is similar to what happened to the old AmericaOne American's Cup boats.
They were bought by the Oracle team and training in NZ a few weeks ago, the keel came off for the second time. Dunno if the hulls of the AmerciaOne (USA 51 was it???) were complete composite, or what, but the seperation of the keel is somewhat mirrored by the tail seperation of the AA plane.
In any event, my neighbor owns a Wiley Cat 30 with an unstayed carbon fiber stick, and to see that thing bend at various points of sail is pretty amazing.
The weight savings are tremendous, but i do hope Airbus and Boeing alike are looking into possible wear and tear problems in composites.
They're not handing trophies out today