Carebear and Aser,
Having helped build and qualify several training simulators, I can assure yu that they can teach you virtually nothing about extreme emergencies like tail rotor failure. I suggest that you do not be fooled by their seemingly perfect ability to mimic the real aircraft. Their behavioor for tail rotor failure, as well as all other flight beyond the normal envelope, has never been verified, and is based on assumptions that have no real flight data in them.
When you draw conclusions about the REAL helicopter's response to situations beyond the normal flight envelope based on flight in the simulator, you are probably wrong, but definately beyond the sim's ability to help.