Retrevo conducted a survey they titled "Confusion and Skepticism May Impede 4G Adoption". Shawn Blanc linked to this and commented:

Perhaps it is the “4″ in the iPhone 4 name (since the iPhone 3G was a 3G device) that leads to the false assumption that it’s a 4G iPhone. But I also wonder if it’s not an assumption about the device rather than an assumption about the network provider. As networks tout their newer, faster networks, perhaps those 34% of iPhone owners (as well as 29% Android owners and 24% BlackBerry owners) assume their phones are automatically a part of the 4G network. Call me a cynical bastard, but I think that if you look at most surveys conducted, anywhere from 10 - 30% of those surveyed will generally be ignorant enough about the subject being questioned to give surprising answers. See the 28% of the populace that still thought George Bush was doing a good job at the end of his failed presidency. The results of this survey don't surprise me, but then again, I'm pessimistic when it comes to the technical knowledge of the general populace. It comes with working in IT for over 10 years.