This wasn't at CRT, but at PSB Akershus in 2005, DH didn't want any of the adult meals and he was given a double size portion of a kids meal.
When our meals came I was jealous! He had plain corn, potatoes and chicken. I had a sour soppy chicken salad.
I would guess they would have no problem downgrading him. I am sure my just turned 10yo will choose some kids meals yet too.