I was going to try to stay out of this one, but one comment regarding topendtorque's points -
Going for airspeed isn't always the answer. A very good article some time ago by Pete Gilles showed that pushing forward and getting airspeed will result in loss of rotor RPM, and hence control, etc. He had at least two examples where the pilots instinctively pushed forward (because that's what they'd been taught), and both rolled over following a very hard landing with very low rotor RPM.
There is no 100%, always right technique for engine failures, either inside or outside the HV diagram. Good training and experience can build judgment as to what to do when the engine stops. Memorizing procedures in the blind belief that one size will fit all situations is not the way to do it.