I agree too. Roy Fielding's dissertation on REST does say that URIs should not contain information about the identity of the user nor the details of the implem

I agree too. Roy Fielding's dissertation on REST does say that URIs should not contain information about the identity of the user nor the details of the implementation of the resource on the server (no .php, .cgi, .aspx) but in a section on URIs (6.2.1) he does say "...REST accomplishes this by defining a resource to be the semantics of what the author intends to identify..." I read that as a requirement for descriptive URLs. And I think of Fielding's dissertation, together with a few RFCs like 2616, as the founding documents of REST.