Well, we are a homeschooling family, so what kids are expected to learn before going to school isn't a factor, but we read out loud a whole bunch, and Ever, who just turned 2 on July 22nd, knows all her letters, and is sight-reading a couple of dozen words as of today.
She likes to fill in the blanks in stories, or "read" (books she has memorized verbatim) to me from her old favorites, like "The Cat in the Hat," and "Hop on Pop."
Even though we aren't doing these things to satisfy anyone but Ever, I am sure they would be a good practice for anyone, and would help any child's literacy to be the best possible for his/her particular level of development. :-)