I always felt as a child that I had so much curiosity and ability to learn but that I never had anyone around me who saw this. I would have loved to have a parent like this.
But there are things you could be learning instead of "how to read" - relationships between things, for example, would probably be more useful. You start with hotter / colder; bigger smaller; and move onto "meat eating" / "plant eating" - look at the big claws, look at where the eyes are.
Yes, but reading is the single skill with the highest payoff, when it comes to learning things that let you learn more things. Why give the kid a fish, if you can teach her how to catch her own?
(Again, as in my other comment, I feel it worthwhile to point out that this isn't a purely theoretical discussion for me: I was myself taught to read at age two, and have never been other than glad of it.)
It takes bad parenting to give a kid that age the impression that asking questions could ever not be okay. As long as that mistake isn't made, the rest follows organically.
