Unfortunately, it's information like this that makes everyone feel stupid - becuase it's not true...
The Titan shipped with the 1900mhz frequency radios in them. AT&T shuffled off a large chunk of 1900mhz spectrum to T-Mobile as part of their buyout settlement. These 1900mhz streams are now active in a few markets as T-Mobile attempts to steal iPhone users from AT&T or those that are upgrading to a 4/4s as a used device.
From the T-Mobile Websites:
T-Mobile Steps Up ?Bring your own iPhone? Efforts | Issues & Insights Blog
"In fact, we?re already starting to turn up 4G HSPA+ service in our 1900 MHz spectrum. With sites already live in cities like Seattle, Las Vegas, Washington DC and the New York metro area, don?t be surprised to hear reports of iPhone ?speed sightings.? We expect to have these improvements deployed in a large number of markets later this year."
So, like I said, there are areas where the Titan will pull a solid 3G signal. These appear to be the Seattle area (as highlighted by my personal experience above), Las Vegas, DC and New York. These are also only 14.4Mbps sites not running the true 42.2Mbps like the new 4G T-Mo devices so real world speeds are going to be 5-8Mbps down.
Anyways, if any of you live in the markets listed above, grab the $30 T-Mo 5GB data plan and try out the speeds and report back!