I know we seem to read things differently, but I read this as he's confident enough with the story, character management, C&C, ect* of Fallout 3 to say it's true to the series, and he's saying this to Fallout fans. He's also anticipating a significant number of those fans to adopt a "wait and see" approach, which he seems comfortable with.
It doesn't sound like the typical PR bluff, it sounds more like what KG was saying in the EuroGamer preview - that they felt like they had something to prove. To me, at least. Like I said, We'll see.