The earlier drafts were much more like that. They were largely a collaboration between a few web companies who had deployed OAuth 1.0 with Dick Hardt who had written WRAP at Microsoft. One of the major design goals was producing a protocol simple enough that client developers would not have to use libraries.
But the OAuth 2.0 spec we were working off of is now eighteen months old and as Eran said the vast majority of those contributors have drifted away from the effort over this past year :-\
I was pretty happy with this result since we could write a simple page like https://developers.facebook.com/docs/authentication/server-s... which conformed to the spec (http://tools.ietf.org/html/draft-ietf-oauth-v2-12#section-4....) and was an easy to implement explanation of authenticating a user.
But the OAuth 2.0 spec we were working off of is now eighteen months old and as Eran said the vast majority of those contributors have drifted away from the effort over this past year :-\