I think you'll find that the TDM is parallel twin not a V twin.....
Yes we get it down under, but as with most of these types of bikes unless it's got a BMW badge on it no-one will buy it.
You guys in the states may have a cruiser dominated market, ours is a mix of full on sports bike or dirt bike.
The top selling bikes in Oz are (no particular order)
GSX1000R
YZF-R1
WR450
XR400
CT110
Not a cruiser or 'dual purpose' bike to be seen.