Just because it’s widespread- doesn’t really prove anything.
I actually spoke to one of the lead apple Genius Bar managers at an NY store, and he agreed it doesn’t seem normal and said he raised it to the engineer group. He then called me back and said the engineer team is aware of the issue, and are still reviewing if they deem it to be a legit issue or just part of the production/tolerance of this year’s line. So if the actual engineers for apple aren’t sure, you certainly shouldn’t be either.
They also checked one of the “replacement” units they have for service issues(which he said are all brand new right now since there is no refurbs), and that one also had the issue so there was no point in me swapping it. Next step is they are going to try to hold a new one for me when inventory comes in to see if that batch also has it. At some point I’ll just accept it as almost every iPhone I’ve had has had SOME kind of small cosmetic issue out of the box it seems, but as some mentioned it’s a bit annoying as any time the the lighting is right it catches your eye as the piece you can see is metal. I’d happily take a scratch on the frame or something over that.