Only while they are learning. Have you noticed when you type on the phone your fingers are flying more or less without you having to actually search for the letter?

I have wondered about this and I think what is happening you actually learn the qwerty layout on your phone and the fingers already know more or less where to go and what you do visually is to just aim where your finger needs to go (ie find the center of the button) and the rest (like reading the letter) is most likely redundant.

I don't know how to or have time to test this, though.