I live in Palm Beach County, which is a fairly large county. The area that I live in is very suburban, with mainly single story housing. I live in a multiple dwelling, but each unit has its own entrance - no elevators or common pathways. There are densely populated areas, though, like West Palm Beach. I attribute the rapid - and continuing spread of the virus to another factor.
In this area, there are thousands of homeowners who do not live here all year round. I attribute the spread to the travel between areas that are hotspots in the Northeast, like New York, New Jersey, Connecticut and Massachusetts, and seasonally occupied homes. Many of the cases here, especially early ones, were people who either traveled (tourism) or came here from their homes in the Northeast. Family members traveling to visit probably increased case numbers, too. Of course, many had no symptoms and didn’t realize what was happening until it was too late. However, there was a case of a couple traveling to their second home in Boynton Beach, who boarded a JetBlue aircraft - all while knowing that the husband tested positive and the wife needed to self-quarantine. They exposed many people around them, and from what I can tell, they seeded multiple new cases.
I know someone who lives in the Villages, and one difference seems to be that more people live there all year round. There’s no major airport nearby, and it isn’t a tourist destination. So, I think there are fewer opportunities for the spread of the virus.