I wasn't actually arguing that people are born to be better at anything, although I suppose this is the general consensus.

Talent = "a special natural ability or aptitude" (http://dictionary.reference.com/browse/Talent)

Aptitude = "capability; ability; innate or acquired capacity for something" (http://dictionary.reference.com/browse/aptitude)

Like tentonwire argued, whether it's nature or nurture, people are better at some things than others.

From what I understand, you are effectively making the argument that anyone can excel at anything. In this case, I also concur with tentonwire, that the burden might be on you to prove that hypothesis.