I find that I can write without looking, since like many others I have been using computers all of my life; we got our first Mac when I was 2 (Mac SE). That said I actually picked up my typing skills in grade 8 since my school had a typing class, and although I thought it was dumb at the time, I'm thankful for it today because I no longer hunt and peck unless for some reason I'm holding something, like a piece of pizza.
As for writing though, I don't look at all, because I write my first rough draft on paper, so I'm reading as I type.