I've just got a new MBP 2 days ago. So far I'm loving the new force touch trackpad. However, my fingers can feel a tiny bit of something appears on the trackpad surface. It is hard to describe. I've have looked carefully and the trackpad is beautifully fine. This thing is completely invisible. You can only feel it with your finger. I tried two display models in authorized stores, one got similar issue like mine, the other is smooth as butter. So I'm very confused right now. Is this thing normal for a new machine and will be gone later on?