Jurplesman, the unfortunate statistics with regard to the facts of domestic violence and abuse are not accurate, by a long shot. The statistic are only gathered and combined by Law Enforcement and abuse hotlines. There is far more abusive behavior that goes on than the general public will ever know about.
Having worked as a parole officer, you've seen it all, and I agree with your insight on this grim situation. I find that the original poster's account is credible for many reasons, but the most basic reason is that it's raw and to the point. She needs to get the hell out as soon as humanly possible - preferably, when the abuser is out for the day.