The thing is this...if other developers couldn't get their engines working, then I'd be more inclined to believe what this guy is saying. However, that doesn't seem to be the case. So ONLY these guys can't get their engine working? On better hardware? It's just unbelievable.
Considering the situation with EA and Nintendo at the moment, we know there's something going on there. Of course, none of us know what that is, but I'm more inclined to believe that this is the main reason why there's no Frostbite 2 or 3.
This is just my opinion of what he said and I'd say he should back what he's saying up with some more details because what he says by itself doesn't make much sense to me. I guess if someone is going to believe that the Wii U is weaker than the 360, then I could see why people would take what he said as gospel. Also, devs are sometimes not so honest about things from time to time. They should be questioned, especially when others are doing or saying different things.