I get that significant amount of people were impacted very adversely by flooding, etc....but in terms of a truly devastating impact from a tropical cyclone in the traditional sense, we are still waiting for that. Once mother nature collects on that tab, we will know it because there will be no need to debate, or call anyone's attention to the borrough in NYC that had some flooding, or to the rainy 60 day period, etc. We will all remember it clear as day for the rest of our lives, and so won't our children and grandchildren.
Good rule of thumb...when you need to remind people of an impact several months later, or cite the litany of reasons as to why you feel that it was impactful, then its probably not to the degree of impact to which people were referencing in the first place.
It shouldn't need to be argued.