Cool. I have that book... unfortunately I also have the attention span of a housefly with regard to diligently following the many books I now own. I'll definitely dig it out though.
Personally I like the tempo you're using. It would be over far too soon if you play it fast
My first proper finger picking track was Aura Lee (or Love Me Tender as the melody is better known). It's from a different fingerpicking book and was introduced with the comment that its a great track for beginners because, within reason, it sounds better the slower you play!