November Bicycles published some interesting aero data on the Pacenti, Kinlin and Enve rims.
http://www.novemberbicycles.com/blog/2014/8/1/november-in-the-wind-tunnel-semi-aero.html
http://www.novemberbicycles.com/blog/2014/8/1/november-in-the-wind-tunnel-semi-aero.html