Hi Willy,
Thanks for your comments. In answer to your question: "It is not clear whether this is Dennett's own view or your own interpretation of his work."
The viewpoint of mine, not DD's. From what I gather he has a very interesting take on AI i.e. that while it might prove technically feasible to recreate human thinking in a non-biological substrate it might prove prohibitively expensive and even unnecessary. To make an actual replication of a bird, intelligence and all, might cost more than the moon missions, but why bother when we can build jet airplanes that act on completely different principles but suit our purposes much better.
All the best,
Rick