Potential Versys owner here and MPG is an important factor to me. To reduce variables I hope to get some reports on the MPG on the super slab at around 75mph, with stock hard bags preferably. If someone does a tank or two this way let us know.
From this number I can infer other mileages.
I currently own a ZZR 1200 and put 70K on an 1100 Gpz. I am finally ready to go smaller and lighter for all sorts of reasons including MPG. Even at $4/gal, to be honest, it isn't cost so much a personal urge to be a little frugal. It's the new trend. Then too, it's possible if not probable that gas could go much higher yet or even be in shortage at some points. Or I just may get poorer, which is a new trend too. Then MPG could be a huge thing.
If that slab number is less than 45 I'll be a little disappointed. My Gpz would get 43 under those conditions with a pretty good load on for touring/camping. The ZZR is a pig. Sure it's insanely fast but that's only useable about .00000023% of the time.