I wouldn't worry about it, I am sure it will shoot well. Like you said, it will be to CMP specs, and I think that by their grading system, a SG muzzle will be less than a 3, and the throat will be less than 5. That one you have in the pic looks great, btw.
They make special guages to test the MW and TE. You can find guages around, but they usually run at least $40 I think, and they are not worth it to me personally.
Some people do the "bullet test" by taking a bullet and seeing how far it will go down the muzzle. The less it will go down = less muzzle wear. I want to say that I read something about that being a no no to do, but I can't find it, and I'm not 100% anyways.
I was just curious about them - I might have the chance to be near the North Store soon with some money to burn, so I was just kind of checking things out - I'd love to get a rifle that looks as nice as yours that is a good shooter.
I got one not too long ago, and it's awesome. I love to shoot it. Makes me feel all warm and fuzzy inside. I have no doubts that you will love yours as well.