Hi Jim,
I haven't noticed the voices either, Well... except the ones saying, "Send Baraka Obamm oney." I think it means "honey," as in organic honey for protein shakes or something. OK... just joking about the last part - in reality no voices.
I type "teh," etc. all the time. In my case it is because I am on a netbook and the keyboard is very small. Ever since I switched from my big lap top to this smaller one I make mass typos. I dont usually bother correcting them. (I just left off the apostrophe on "dont" again from typing very quickly, but on a tiny, tiny keyboard.)
So, for my case it is just wanting to type very fast, but losing some skills w the smaller key board. The change of proportion of the keyboard thros me off a bit, but I really like the convenience.