Charlie Parker was atrue musical genius, he had the IQ aquivelent to a 5th grader! From what I understand there is a specific part of the brain that deciphers music, and some peoples are more developed then others.
As far as natural ability, I once read an article by a music critic who said he would rather listen to someone who put a lot of hard work and research into his playing then some prodidgy, according to the author the musician who worked hard all his life played with much more enthusiasm, passion, and integrity then the natural born player who never had to work hard or practice.
so.........what is talent?