Right, but if there were such a sink hole problem here in the Villages where sink holes appeared under the home and the sink hole insurance paid for it, I would think we would have some responses by now.

well we do have sinkholes
 

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Well I had that question 7 years ago too. There are sinkholes in TV and in FL. One of the retention ponds near a golf course went dry a few years ago. I've lived in two villages that have had sinkholes - fortunately in or near the street. The most recent one was about 1/4 mile away and took a couple of months to be repair about a two foot hole in the side of the road. I would not drive my car or golf cart near it until repaired.
As far as insurance. Regular HO won't cover if you have that kind of loss so you are better to have it than not - like any insurance when you need it, you need it real bad.
Every year, I check out my HO insurance to make sure I'm getting the "best deal" - not necessarily the cheapest. I have found that different companies have a different PERCENTAGE DEDUCTIBLE (similar to hurricane) and thus the higher the coverage on the house, the higher the deductible. I was very happy to find recently that State Farm has ZERO DEDUCTIBLE (other than you normal policy deductible) on sink hole losses and State Farm was comparable to my previous company plus their auto coverage was less so my home/auto coverage premiums has come out a little lower.