Caster Semenya - A Man Or A Woman? Does it matter?

If you're not familiar with this story, I'll try to sum it up. Caster Semenya, born 7 January 1991 in Pietersburg, is a South African middle-distance runner. Semenya won gold in the 800 m at the 2009 World Championships in Athletics with a time of 1:55.45 in the final, a personal best and the fastest time in the world that year. 'Her' gender has come under question by the International Association of Athletics Federations, because if 'she' is male, it would raise questions about competitiveness. Anyway, this story made me think about general competitiveness in sports. It is widely accepted that males and females should compete in groups of their own when it comes to sports, but separating people based on physical differences leads to gray areas. Should East African runners have a class of their own because they generally win their events? Should 6 foot males only compete against other 6 foot males? Should people with advantageous bone structures for a particular physical event be put in a class of their own? We're all born with our own particular body, with its flaws and advantages, so do we ever compete on equal ground? Some people are just born with a natural advantage for certain physical tasks. I guess it's just about where we draw this imaginary line. This raises questions about general competitiveness, not only in sport, but in life as well. I'm not really sure where I'm going with all this...