I think if there was a real design flaw we'd be seeing a lot more of us going down. I just finished a 20,000 km/12,500 mile trip from Newfoundland to California and back.. some of it two up and mostly over loaded with a Give 52 trunk, 17 litre tank bag. Like most of us, I do not stay at the posted speed, but I have no need to go faster than 100mph occasionaly and mostly cruise at 80-90 mph. I do get a weave in dirty air behind trucks... hey, I've got a footprint of what, 4" x 3" wide on the pavement under each tire... I'm going to get blown around... drop back and or pass (pass, pass, pass). I occasionally got a shimmy resonating from broken pavement... metal bridges.... but I have never felt a wobble start... not to say it can't... but I think there are so many factors in play.
On my old BMW 75/5.... I could be rock solid at 80 mph... put on the trottle lock and drink my coffee... the days of open faced helmets. I could give the end of the handle bars a smack and not distrub the ride... but, I also had a couple of close calls with medium speed... 60-65mph wobbles... harmonics. load, tire wear, pressure, wheel bearing play, side winds, excessive speeds... so much comes into consideration. I just really think a lot more of us would have already have been dumped by this bike if there was a real design flaw.
Then again, it could be the casual worker brought in from 2pm to 5pm every 2nd Tuesday who messes up assembly on 1 bike every 2nd week?