I teach, among other things, classical guitar. I have a student that has been with me for about a year and a half. He's learning only classical (some students expand into other areas, some don't study classical at all).
He reads nearly flawlessly the entire length of the fingerboard in almost any key. He loves to play. He recently gave me one of the greatest complements I've ever recieved as a teacher, with a tear in his eye told told me that he was able to play for his mother the last three