It is somewhat frustrating to know that those who write the guide books for various governments, as well as those who write the tests are schooled in the same pop-aerodynamics course.
There is no helicopter on the planet that will experience VRS at 35 knots. (The end of that sentence is a period)
Take a gander at the plots shown at the web site I posted a while back, when this thread was young:
http://www.s-92heliport.com/vrs.htm
The data is excellent stuff, created by some good NAVAIR engineers in briefings on VRS in the V-22.