Interesting comments. I took a '10 GSA out for a spin (for about 1.5 hours), fully expecting to be amazed by the lighter handling, amazing performance, and overall ability of this bike, but it didn't really happen.
I liked the leg room, but did NOT feel it handled better than the RT. Being so high means lots of lean, and although it steers easier, going through a quick series of corners made me feel more like we were waving at the end of a stick than riding.
The GSA we tried also vibrated more than the RT, which made it feel a little more rustic. Didn't like the wind buffeting on the GSA either.
The RT felt more compact, and more "planted" to me, plus had more gadgets, and much better weather protection.
I'm not trying to diss the GSA, which is obviously a really great bike, but there are some (like us) who tried it and went for the RT.
YMMV of course.