Thats what I am curious to know as well. My guess is, matte coating is probably more vulnerable to these scratches than glossy.
Also, now I dont know if I should still keep the case on or what? I know it'll get worse if I don't get rid of this case but then what case should I use? Confused :S
I'd still go after nokia to solve this issue. If you are seeing a similar issue, please make sure you bring it to nokia's attention and let them that it hurts to see such an expensive "premium" device to get screwed in 2 weeks by their own case.
If you are someone planning to get this case, stay away!
If you have already ordered, return it and look for some other way of protecting your device.
If you think you wont run into this issue, good luck!