Well I think that is telling of the sort of people they polled.
makes you think, don't it?
anyway, most Americans don't know how any part of their financial system works, but they trust it and use it anyway. In this simple fact is the "killer app" that btc is waiting for...namely... get people to use it without really realizing they are using it. By the looks of things, the FED is working on a digital money transfer system to be implemented that way (seamless on consumer end, way cheap and fast on banker's end) but it wont be BTC.
Unless some devs or other brilliant person/people figure out how to bring BTC usability to everyone, regardless of their tech savvy, make it foolproof, even with some add-on that gives a reversibility function to transactions (or like multisig has escrow built in) the banksters will do it first and BTC will go the way of the dodo bird.