I never saw those references above but http://draco.acs.uci.edu/rbfaq/FAQ/9.15.html
includes countersteering. The article doesn't scream at you 'BIG DEAL HERE' but it should. In a book which is a compendium of some old bicycle rag articles I found a chapter by Davis (?) Phinney about descending which was really about countersteering. Sorry that I can't remember more to help you find the book.

I get uptight at >35 MPH no matter what. I go faster, but, but, but,,,