One reason people have problems on sport touring bikes is that they want to put a tall windshield on it - which they are not designed for. The bike is designed for a slight forward lean. Taking all of the wind off you means that more of your weight is being held up buy your arms instead of the wind.
I agree with that sentiment for the "sport" part of the equation, but in my experience, the long hours spent in the saddle for the "touring" side, a shorter windshield results in getting beat up with the consistent wind one experiences when running on the slab for many hours. So if one wants to do long distance riding with this bike (or any bike really) a taller windshield is necessary.
I guess it all depends on one's particular use for the bike. Unfortunately, no machine can do everything well as much as the ads try and tell us. Though the adjustable windshield does allow one to keep it lower for the fun times and higher for the distance pretty well.
-David
Athens, GA