I think I’ve read that too, but even when you take that into account, the numbers still seem awfully lopsided.
TechCrunch put together a good report in May about female founders of funded startups. The numbers are improving, but the gap is still pretty big (PDF), especially when you compare it to overall business ownership (PDF). Here’s another fact sheet with more detail (PDF again!).
One statistic that jumped out at me just now when I was hunting down those links is that women are far more likely to rely on their own savings to start a business than men are, which is strange if women are generally more risk-averse. Maybe women are less willing to risk other people’s money than they are their own?