I heard a few people at the next table talking at a restaurant about the new Thunderbolt. Try said it's "a droid" and it was a solid phone because Microsoft built it. I won't comment on if the percentage is valid or not, but a LOT of normal people out there are confused about the current mobile landscape.
You should adjust your belief to fit the available data, don't adjust the data to fit your belief.
I would normally agree, but in my opinion, surveys fall into the "Lies, damned lies, and statistics" category. They hold the same value as apache-bench numbers that are posted every time a new webstack appears.
Verizon's long and frequent Droid advertising has brought the name to the masses. I know plenty of people that don't know the difference between "Droid" and "Android", but they all recognize that they reference smartphones now. Plus there are so many millions out there, most people at least have a relative that's shown them their neat phone by now.
I would love to know how they performed this survey.