It's pretty much on the money. Infrastructure and preparedness are the real factors of surviving a hurricane. A majority of new houses and buildings in FL are now cement or steel construction in response to Andrew and then the 2004 hurricanes. Wood construction is not popular anymore. This doesn't include the massive waterworks projects all across Florida to mitigate flooding.
Per [1], the comment appears to be partially correct. The data prior to 1950 does not agree with [1], but hurricanes were not tracked in the same way prior to 1950. The author may just using a different source for those estimates.