OA is “cool” but has certainly been overstated
“Of course, we need to be honest about the true benefits of Open Access. Let’s face it, most of its promise has turned out to be overstated. It’s unlikely that OA will radically remake the world of scholarly communication, nor will it have much positive effect on libraries’ bottom lines. It may not confer a “citation advantage” that some claim it does. But we can be fairly confident that it does widen readership, and that in itself is a worthwhile goal.”
David Flaxbart. ISTL Was OA Before OA Was Cool. Issues in Science and Technology Librarianship Fall 2011.