I would venture to bet that they all failed to put out enough ground tackle and otherwise properly prepare for the storm. Did anyone drag and take others with them? There is a good chance that they did not make allowance for the storm surge that accompanied the storm. Hurricane holes are shelters, but are not the guarantee that some might think.
I have plans to sail all over the Bahamas, but it will not happen for a while...have to get my boat better equipped and save up some money so I can spend the entire winter down there. I''m not terribly inclined to spend the summer there.......hot, humid, and not a good place to get caught by a major storm.