With only a year's lessons, he's good. I'd be proud too.
I played guitar for almost 30 years, and loved it!! Unfortunately, a stroke 7 years ago left me with a right-side deficit, thus ending my real playing days.
I played acoustic, both 6- and 12-string, both Martins. When I could no longer play, I gave them to my best friend's then-11-yr-old daughter. She already played a mean piano, and took to guitar like a fish to water.
She was homeschooled, and got the equivalent of a HS diploma at 14. By that time, she was an accomplished piano player and guitarist, plus picked up the banjo.
She is now 19, college graduate (BSEE) and married to her childhood sweetheart. She still plays for her "Uncle" Mike, who thoroughly enjoys seeing his musical instruments put to good use.
BTW, she is also taking violin lessons!!! That girl has talent!!