Warning: This post is based on huge assumption, for which I have no factual basis. Someday, if I go back to school, I think I will do my Master's thesis on this, with lots of research. But for now, all conclusions are based on purely anecdotal evidence.
I love to read. I started reading pretty early, and read everything I could. Some of my earliest memories are of sitting on my dad's lap while he read Bernstein Bears and Dr. Seuss books to my sister and I (my dad loved the rhymes). I found books so much more interesting than real life that I would narrate my life, wanting it to be part of a book, frequently adding "She said" to the end of my sentences (Yeah, I was a dorky kid). My parents doubled our allowance if we wanted to used the money to buy books. I still spend a ridiculous amount of money on books. And now, with iBooks, I read more than ever.
I realize there are plenty of people, kids especially, who don't love reading. Reading is hard. Or tedious. Or boring, because they are forced to do it. But for me, reading, like theatre, is transportation to another world, involvement in other people's lives. It's magical.
My friend Steve and I have this theory that "Good Actors are Good Readers". In our work with actors, whether as other players or as directors, we have found a striking similarity among those actors (of any age) with good instincts and a solid understanding of the text they are given, able to inflect and contextualize properly-- They love to read. These actors love words, language, story. As they savor language, they are learning- new vocabulary, meanings of punctuation, how to craft a story to keep outsiders interested. All things they need to know to deliver an excellent performance.