The main objective of the article it seems is to allay fears that more women in boardrooms would not be a bad thing. I honestly don't care for such studies. What I do care about is the fact that more and more businesses are going to be told _how_ to hire. This is a terrible idea.
Furthermore, the article goes on to say that there have been no changes in the profits reported and that the companies across Europe have seen no change whatsoever. This might say much more about boards and their lack of effect more than anything else.
What I see happening is that due to the increased regulation on how businesses operate, more of them will not go public and thus prevent a lot of the population will miss out on good investment opportunities.