It may eb alot of things but its not IQ I can tell you that for sure. Havin a high IQ just makes you think your better than everyone else.

There mightnt be a natural talent for guitar but for music definitely. If you have a talent for music and can pick notes out easily, it makes playing alot easier. Thats why pros always say the best way to be a great guitarist is to learn to read music and to learn how to tune. Technical ability is nothing if your musically dunce.