I'll second that BikeLady - endurance wise women are a lot better. You only have to look at the women involved in Ironman and Ultra- Iroman triathlon events to see how well we do. The longer the distance the better women do.

When I was involved in rowing you could also see the differences. While men may have the brute strength the womens technique was far better and much more economical than the mens. Same with road racing, while womens races might not be quite as fast, tactically womens racing it top notch!