Meryl Yourish defends reading, here. All three of my sons read a lot; partly because we have no broadcast TV in the house.
The Littlest Guy, who is 5, read himself to sleep last night with ‘Barney and the Dinosaur’; when we went in to turn out his lights, he was asleep with his head on the book. Biggest Guy was just assigned reading as a part of his honors program at UVA, where he’ll be a freshman next year. ‘Ender’s Game’, which he read when he was about 12, and wrote papers about in high school (hint: I think he’ll do well with the book). Middlest Guy is talking about writing his own RPG.
They aren’t geniuses; they just have the habit of reading.
Kill your TV. It’s the best thing you can do as a parent.