Originally Posted by flip

I am sure you would find it interesting to visit a true bi-bi program in person, as it seems you haven't? Sign, talk and speechreading is facilicated, and communicative skills is one of the advantages of bi-bi compared to oral or mainstream programs.

There are examples of earlier deaf bi-bi students that run companies with hearing employers, so I doubt their communication skills was limited by bi-bi. In their cases, it looks like their communicative skills was developed to it's maximum, as they had the opportunity to communicate in a rich environment with no language barriers.