I can type really fast on the iPad mini in portrait mode. I wouldn't bother using a keyboard with it. I'm much slower on the full sized keyboard and would probably consider using a keyboard if I was going to be doing a lot of typing with it. So far, I have never felt the desire to. On a side note, I'm really looking forward to the iPad mini with Retina. I loved the old mini, and I'm really glad Apple didn't make the new mini a lesser iPad than the Air.
11/12/13 at 6:07pm