My anecdotal evidence suggests precisely the opposite. Are you gaging it by what they choose to do among themselves, or what they use when working with an English speaker?
Most of them who speak any English speak very rudimentary English. Yes there are people there who are fluent in English, but they're a minority. The ones who are, or are near-fluent, are almost always people who have lived on the mainland or work in the service industry.
Santorum comments:
If he was wrong why aren't there people jumping up and down saying "Hey almost everyone here speaks English!"?