Gents, we underwhelm and over-represent in the ranks of leaders, quite across the board. Ladies - clearly, this is cause for pro-active optimism. The statistics don't lie (even if they don't exactly explain top-notch male leadership, either).
Men are - on average - better at politics, maybe that's the bull of the explanation for the number disparities. But if women are better communicators, what's getting lost in translation?
Excellent food for thought:
Are Women Better Leaders than Men? - Harvard Business Review