linhdtu's reponse is far better than what I was actually thinking. When I wrote that comment I was thinking about how almost everyone seems to have been completely blindsided by the FDA's approval. That includes Amphastar, Watson, Momenta, analysts and this message board.
Obviously Amphastar was blindsided else they would have been ready for an immediate launch as Sandoz was.
If the sponsor was blindsided, how can anybody else outside of the FDA expect to forsee it?