UPDATE: I received a word that Nikon is looking into this issue and will have an official statement soon. Let's wait and see.
"Failures Observed: lens thread defect at 200mm (the customer believes either thread or its coating peeling off). Inspection requested.
Maintenance Performed: After inspection, thread of the lens submitted indeed has certain peeling. However, that is normal when the surface of that metal was manufactured. There, the alleged problem will not affect the len’s performance, rigidness, or function."
If Nikon USA has an official statement on this issue, I would be happy to publish it here.
Thanks longtimenikonshooter for the update!