Make sure your window is alllll the way up...I had the same sound until I realized the window was about 1/8 inch shy of termination, which, btw, isn't apparent by eye.
No kidding...I ordered a fairly loaded BL (360+, premium, floor mats) end of March, got a build date 3 weeks later, and am now "in production" - a week early. My sales person told me she had 29 vehicles on order before me (!).