Can the people who keep saying that water is as hard as concrete at speed please stop being silly. It gets no harder at any speed. It is still water. If you fire a pistol into water the bullets penetrate a couple of feet. Try that with concrete.
In anything other than a near perfect ditching ANY aircraft will suffer SEVERE damage, if not break up into separate pieces!!
Aircraft are not actually THAT strong!! Only those parts that are highly loaded will remain largely intact, due to their inherent strength. They are certainly not designed to land on water in ANY circumstances, unless they are seaplanes of course.