Guidance Needed - Are we Misguided in Informal Learning and Collaborative Learning Techniques

Found via: Big Dog, Little Dog - a very interesting article: Why Minimal Guidance during Instruction Does Not Work: An Analysis of the Failure of Constructivist, Discovery, Problem-Based, Experiential, and Inquiry-Based Teaching - Educational Psychologist

It points out that open learning environments may not be good ways for people to learn. Doesn't this suggest that informal learning, collaborative learning and other approaches to learning that do not provide much guidance are - well - misguided?