I realize that the tooth wear doesn't look all that extreme in the pics, you have to see them in person. I have jaw bones from 2 1/2, 3 1/2, 4 1/2 and 5 1/2 year old deer that I used for comparrison also. As stated above, the area where these deer are from is not that hard on their teeth compared to other areas.
I saw both deer the year before I shot them, they were older than 4 1/2 and 5 1/2 when I saw them for the first time.