Yes but we are talking about getting into VRS with lever positions so high that without the engine running, the Nr would decay rapidly - it doesn't sound like autorotation to me. If what you say is true then all the stories of aircraft falling out of the sky or taking several thousands of feet to recover are not true and all they had to do was wait and it would fly out by itself. Sorry but I will need a lot more convincing evidence than a Jetranger graph to disprove the accepted theory on VRS