If anything about my experience can be called "normal," they yes, I suppose it is normal for his age, because my report cards at his age always said I talked too much, and I was getting Cs and Ds in penmanship (because you can read it, I can read it, that's the point of the exercise, so quit bugging me), and neither "issue" has had any major impact on my life.
Honestly, I wish I had your problem. I'm actively encouraging my DD9 to talk more in class as a coping mechanism/safety valve when she isn't learning anything. She's way too compliant, and that brings its own set of problems.
