Dragon Age 2 is not subcontracted to any third party, unless somehow, Bioware is trying to keep it a secret, and David Gaider and Mike Laidlaw are simply talking about things they really don't know about because it's someone else doing their work.
Really, I'm not Bioware's biggest fan, because, while I can understand why they keep the same formula, it's starting to be a bit tiring to me, but that's just gratuitous bashing.