I think one problem with demo's is that Jap dealers in the UK have never really needed to, young men bought the latest 600 supersport, and older men bought the latest 1000cc superbike.
The off-road image sells a dream more than anything and adds some pose factor for those who may never see as much as a gravel track, but buy into the image - just like those who buy an R1 and never see 3 figure speeds or get their knee down buy into the race image.
As mentioned we have little off-road opportunities in the UK, but some minor back roads and lanes would be quite horrible on bikes like the FJR, these roads are often the ones with the least traffic and the nicest views, I also like a bike I can stand up on now and again, either to stretch my legs, or get a better view of the surroundings (or even see further over a hill crest - very useful on single track lanes)
The attraction for me was a bike that can do anything, and does most things very well, I think many people would love one of these bikes but just don't know it, I certainly wished I had ditched sportsbikes years earlier and bought something like this - although up until 2010 the only thing out there was the GS, now everyone has a variant on the theme and I think all manufacturers could promote these bikes as I think it could bring more people in to biking, and stop some from leaving (those who are bored of risking life and licence for two hours every Sunday)
Certainly promoting this particular bike as one that will do everything week in, week out - and keep going is the right way.