Onetrack, in post 213, makes sense. A well built aircraft can withstand a rupture in the hull, even with explosive decompression. But the elevator and the rudder if damaged could lead to unusual attitudes. The flight path described certainly looks like a spin, the turn one way, then the very rapid spiral descent. As for no communication, we all know the rules. Com comes last on that list.
The Med must be the worst place to search for floating evidence, it must be full of rubbish of every sort, especially life jackets near Greek islands....seems to me the sooner they can try to locate the ping from the recorders, the sooner they may find the wreckage.