ATSB study may help
Oz safety people put out a little read paper on light helicopter safety.
It compares one type to another, in accident, and we have about 600 whizzing around down under.
What did they find?
The Robinson, being FAR 27 standard is many times safer than products X, Y and Z.
Other thing to note, (in an R22) if you hit so hard it busts the fuel tanks, then you are dead meat! Impact forces are beyond human tolerance.
I will dig up the references later .. and precis here.