I remember that article, Pan, but I think it was mostly talking about girls in secondary education. Generally , I think that the change has to come about at a much earlier age, and there needs to be a far greater change in the perception of what it means to be a girl or a boy. There is still a general feeling in this country that girls do ballet, boys do sports. There is definitely not enough encouragement at an early age to get girls into sports ( or boys into dance, for that matter).
If girls started football at the same age as boys, because it was 'expected' of them, and there were the same numbers of each entering the sport at an early age, then girls football would be so much better in a few years time.
There is also the influence of the media/public interest in mens sports vs womens sports. Generally, mens sports are much more in the public eye, and of course, much more money is involved. But yet, the best game of football I ever went to watch was a womens match, it was amazing. But you never see that on the television. It's reinforcing the message to children, and also to adults, that mens sport is more important that womens.
Of course, it works both ways. It's interesting that my DD goes to a girls school, where lessons include traditional 'boy' subjects such as football and cricket as well as dance, but the boys school my DSs go to don't do dance or netball, for example.