I don't think either is true. I think that one of the benefits of the Women's Lib movement has been to empower more of these battered and abused women to come out and file charges against their spouses/boyfriends. There may be more incidents per capita, possibly, because of higher population densities and the resulting stresses. But I wonder if at least some of that isn't counterbalanced by a possible decrease in men who abuse women, if for no other reason than that it's no longer considered 'private'.
On the other foot, though, I think more men who are abused, either physically or emotionally, are also coming out about it, seeing it less and less as a stigma. It's like many other things which were kept behind closed doors in the past. A new, more open, more connected society is kicking these aberrations out into public, and that's a good thing.