I have a Tourer, so this won't apply directly, but...
When I had an OEM windshield, I could ride around with my faceshield open
and be comfortable...
After I got a four inch shorter windshield, there was way too much buffeting to ride comfortably
with the faceshield up, but with the faceshield down, everything is smooth as glass...
So... what I'm saying is that your helmet choice might help... I guess, though, that some
folks would rather not ride than be closed up in a full face helmet, but I grew up on a
dirt bike and feel at home inside there...

-Mike