According to an article posted on insidebikes.com Harley FXD Dyna series sold 778 units in the U.K. for 2006.
To compare numbers, the BMW R1200GS, which was the top tourer in the U.K., sold 1468 units.
It seems to me that they are making progress considering Europe is supposed to be a weak market for cruisers.
"Supersport bikes dropped by 5%, (possibly more than that if you subtract the 1700 unit sales of the CBR125 R, which the MCI list as a sportbike when it obviously is not )"