There's no question I'd rather ride tar snakes on the 890 or 1290 vs the Wing. But once the Wing hits clear pavement it does instantly regain composure. It's an amazingly well composed bike. But you can't make 800lbs completely disappear.
All those "the weight disappears after it moving" statement are relative, and ... BS. You don't get something so wonderfully stable at 85 MPH sustained, that you can then effortlessly throw from side to side in the twisties. You can absolutely enjoy it on the curvy roads, but it no doubt takes more force to change directions. Not a bad thing, it just makes you aware you are riding a different weight class of bike. For self preservation, you best be aware of that fact.
The biggest adjustment I have to twisty roads is the lack of available lean angle. It only comes into play when I go out to the really good stuff. During daily riding the lack of lean hasn't been a factor. For the hardcore stuff it's an exercise in body-english. I haven't done the good stuff enough to be fully competent at it. Still enjoy those conditions, but I do feel a bit held-back. I blame my skills, not the bike. It does make getting on the SAS and hammering the corners feel so good.