After reading this thread, I agree that the "ability" to color nicely is one question. If you can say that he can color within the lines, then I would think he has trouble seeing value in the assignment.

Not saying that your son is like mine, but when my ds was told he didn't try and rushed, it was not true. My ds had a vision issue and needed vision therapy. What that teacher said to him, crushed his self- esteem. He still gets nervous if he sees her.