as soon as I find a problem with the stock damper, I'll replace it in a second. but I haven't had any issues with either the fixed '10 damper or the adjustable '12, which I have set at maximum. The only time I feel how stiff it is, is when I'm parking my bike.
Bike setup is indeed important; I've bought two Ducatis that didn't come with dampers. Never had head shake on either, but it's a completely different feeling at speed, and I don't particularly like it. Slapped some dampers on them and all is better!
2012 S1000RR, sapphire black, DTC and HEATED GRIPS
2014 Ducati Multistrada Granturismo
2011 Ducati Monster 796 ABS
2000 Ducati ST4 (sold)
2010 S1000RR (sold)
2007 F800S (sold)