This article is behind the times. By the time most professional women have learned to ask for raises like some men do in 2011, those men will have moved on to a more advanced strategy to make more. It's similar to how an expensive university degree is becoming less useful just as women are earning more than 50% of them.
My point is that these men are competitive and they have momentum and the current salary-negotiation-education strategy won't result in parity. I don't see any reason it has to be that way, of course.