People are having legitimate complaints in every country and for each build (Chinese or Finnish) that I've seen so far. Blaming it on a particular country... folly at best. I have a Chinese built Australian version N9 and I have an Finnish built Dubai N9. They both have lag when updating the messages (be it email, Twitter or news feed) and that's before I had used N9 Quick Tweak. Lag exists. It's not as bad as some folks are saying, but it's there on certain tasks or certain things.