Even when I started piano with the Thompson books during WWII it seemed the titles were a little "too cute." However I went all the way to the last book (8?) before getting real sheet music. If they haven't updated the titles of the exercises I can imagine your reaction!
Wow! You bring back long forgotten memories.
In today's world those references seem hopelessly out of date.
Since you are a member here you can pull up and print any grade of piece you choose.
In my opinion those grade assignments are very accurate.