I'm saying that mine was manufactured on November 8, 2012, ordered on November 23, 2012, was shipped to me from a distribution center in China, and it came with the Samsung display.
I don't know if they are installing LG screens one day and Samsung the next. If they are exclusively using the Samsung screens now, then getting a unit that was manufactured in November is a good thing.
If there is older stock in other distribution centers, then that might explain why someone who placed an order around the same time, might get one with an LG screen.
I've ordered a number of Apple computers over the years. The first being an Apple II in 1979. This is the first one that wasn't shipped from California.