While I don't doubt In-Stat's research techniques, comparing wireless technologies on paper based on specs doesn't do any of the technologies justice. So many variables affect the performance of wireless broadband networks that each could out-perform the others given a certain set of circumstances.
The study did bear some interesting results, though. More than 50% of respondents indicated they would change their current home broadband provider for one that bundles wireless with a home broadband service. Respondents' interest in cellular data decreased dramatically when presented with pricing (most plans are $60 per month). Lastly, the top two service attributes used in selecting a wireless broadband provider, when not factoring in price, were availability and reliability.
I'd like to see how In-Stat worded the questions on WiMax's availability and reliability. Sure, Clearwire has some WiMax networks up and running in the Western U.S. and Sprint will be launching several markets later this year, but right now 3G wins hands down on availability. It will be years before WiMax networks are as widespread.