I have found the windscreen on my 2010 less than ideal. While there is little buffeting, the wind noise on a ride more than an hour long was becoming tiresome. (I don't like ear plugs.) The new Givi screen looks promising but it is expensive and not in the U.S.A yet.
Here is my solution. I had some aluminum so I fabed some brackets to raise the original screen up and back. The result is a huge decrease in wind noise and wind on my helmet. Part of what seems to make it work is the large open space underneath the screen. This keeps a low preasure area from forming behind the screen which would create noise and buffeting. (Experimenting with closing up this gap with plastic did just that.) The wind is pushed over my helmet but I still get cooling air on my torso. The faster you go, the better it seems to work.
I may build another example that is adjustable in the future. I need to put some miles on this set-up first.
Here's some pics. (Yeah, it looks crazy, but I like crazy.)