The problem with the Triumph brand in the states is the HD brand and as previous comments have stated the reluctance of people to be individuals. The reason I changed from a BM R1200GS is because the biking community over here is obsessed with adventure bikes, every bike mag you read is full of adventure bike articles and holidays. A couple of years back it was sports bikes and track days, that's not gone away entirely and that's the point, people tend to go with whatever is flavour of the day and are influenced by their friends.
You can tour/holiday any bike, I have enjoyed every bike I have owned and had many a discussion with friends about what to replace the GS with, now I'll let the Rocket do the talking for me, I ain't had it long but I'm smitten and it's a keeper for as long I remain on this rock.