my oldest was reading by 2 1/2. At 3 he was sitting at day care reading books aloud to the other kids while they waited for the parents to pick up. Hes 6 now and in kindergarten. they say he's reading at a 5th grade level now but really he can read anything ( in english) you put in front of him phonetically. My wife still thinks its a trick
My younger son is 2 1/2 now and he's not really reading yet at all. he has his letters down and knows his name and his brother name if you write them but thats about it.