They didn't include KTM or URAL in that list so the title of worst is still pending.
My hunch is that KTM will give BMW a run for their money,
Anyway this has been going on since I started looking, from about 2004, Thought it may have been just a temporary issue, as I too had drunk from the marketing and historical Kool aid fountain.
Since then I have found that the car division is average year on year, and the Australian BMW fleet can't cope with Australia at all.
http://www.canstarblue.com.au/vehicles/cars/reliability/
If BMW was charging the same as an S10, then the added features may make up for the downsides, but at 30% more Not for me.
However they continue to sell well (for BMW), so nothing will change I suspect.
Remember for the average Joe..
Cruiser = Harley
ADV= BMW (GS) Best bike in the world etc.
Sports bike = JAPAN. (probably slowly turning into Sports bike = KAWASAKI if the amount of ninja's sold is any indication.
Or DUCATI if you are older.
My guess is that they chose those brands because these guys are not bike guys and those are the ones they knew about, because they are average Joes regards bikes.