The application of Dembski's ideas is a much more difficult subject, and not one I have enough expertise in to comment, at least in the biological realm. But,

The application of Dembski's ideas is a much more difficult subject, and not one I have enough expertise in to comment, at least in the biological realm. But, the fact that DNA is highly compressible, as you point out, would indicate it is at least not due to a random process. The article is meant to point out the overall framework is valid within standard information theory. It is not a commentary on whether Dembski's work has been correctly applied or not. I think the goal in evolution is at least to survive and reproduce.