Before this topic joins the Rotorheads forum, it is probably worth the more broad observation that the pilot escaped and survived, and passengers were unable to survive. This does not make our industry shine. But, I will watch with interest to learn if the pilot was wearing a lifejacket, and perhaps had egress training. At the very least, it can be assumed that the pilot was better trained and practiced to simply open the door and seatbelt than passengers.
At the least, the pilot should be commended for what appeared to be controlled contact with the water.