I just took a quick peek at the site and then numbers posted above seem to reflect the highest winds recorded at that site.
That seems to be the only “objective” information I can come up with.
If these wind numbers hold true it kind of puts things in some perspective. This was not a wind event, those winds are just not that bad.
From what I can see so far it seems to me to be a combination of a marina not adequately designed for the task with the extreme storm surge.
Ironically not stripping sails may have not contributed much to the issue. Really hard to say looking a you tube. But that may be wrong, even furled sails add significant Wind load. Add a few boats with windage attached and the dock becomes stressed.
We have easily rode out 50+ knots on the hook and 60knots on a floating dock with sails on. Our neighbor (29’ bayyfield) didn’t do a neat job of furling and let a pocket of his Genoa get loose, that was impressive. Makes a believer of you in about 10 seconds. Windage on a 45’ tall cabin cruiser was stressing the dock and with any wave action it would have broken up quickely.
We rode out Gloria (?) and Sandy on a floating dock, very uncomfortable about that, watching the pilings slowly disappear. But we had done a lot to secure the docks, boats were tied tight to the docks, docks were anchored, boats were anchored, docks were tied to telephone poles. In short we made it all one structure and tried to secure it whole. Probably not possible at this marina.