The tape doesn't lie. The reactions of Witten and Williams at times when they were totally open down the field and Weeden quickly dumped off to a TB doesn't lie.
I absolutely believe what's coming out of Valley Ranch is largely BS. Sure, I think they wanted to get Dunbar on the Atlanta LBs and there's nothing wrong with that strategy but you can't do that an entire game. I think they knew they had some plays they could make down the field but Weeden just missed them because as his career has shown, he's often just checking down. He did that in Cleveland and he's done that here.
And Weeden both shoveling BS and being defensive absolutely fit. Regardless of the game plan, Weeden's being attacked for an apparently inability to get the ball down the field. So absolutely, he would be defensive whether the game plan called for this or for that.