I'm VERY curious who you insure with.
BoatUS crunches the data after every storm. They noted that Sandy was something of an anomaly since so many hauled boats were damaged, but they still recommend hauling before a named storm - so strongly that they will pay half the cost to haul and re-launch - because years worth of data says that's where you're safest.
I would bet that if you looked at the FEMA flood maps for New Jersey and New York you could correlate which marinas suffered surge damage.
In our case I decided to go upriver from our marina on Barnegat Bay to one that was six feet higher on the elevation maps. Our marina had quite a few boats damaged by the surge, where I hauled no boats were damaged. The water didn't even get up over the parking lot.
If my insurance company made that kind of blanket statement I'd find another company (sorry for the thread drift).