Re: Floated off the stands
I'm not sure exactly what happened. The cabin remained pretty dry. Seems more like a boat landed on the starboard side, all the stanchions are bent forward. seems like most collision damage. The engine looks flooded, no battery power at the moment, and the bottom of the rudder is about 2 inches further to the right than the top. The flooding was about 6 feet above ground level, and apparently 32 boats got swept into a big pile between buildings. I can't really tell if the mast is straight.
Re flooding: in this case once the storm surge went down, it did not come up nearly as high again. On a "normal" grounding I tend to agree with you, but happily have no direct experience. There are boats high and dry all over the area, in places that seem to be well above sea level. A lot of floating docks went over the tops of pilings, which are 15 feet high?