I think this post complements the "How Effective are Technical Interviews" post that was on HN recently. A CS curriculum definitely prepares you for the theoretical questions asked in a technical interview, however, neither a CS degree nor a technical interview give you a real sense of how strong that person is at development.

I don't think this problem indicates the usefulness of a CS degree. Instead, I think it says that the only real way to learn how to program is to program.