It's not just the Europeans that are missing...
At the Society of Experimental Test Pilots annual symposium this year, there was:
Exactly one helicopter paper given (V-22)
One test pilot from Boeing Helicopters (including both Mesa and Philadelphia)
No one from Bell, Sikorsky, Eurocopter, Westlands, Robinson.
One Russian test pilot (but not from Mil or Kamov)
Only US Army pilots I saw were students from the US Navy school (in the defence of the others, the Ft. Rucker folks were evidently ferrying helicopters away from or back to Rucker because of hurricanes, but still....)
It's like helicopters are definitely second class citizens as far as manufacturers are concerned, especially in the world of flight testing.