Looks like I can add another successful data point. Applied for a match on October 13th from OW Emerald (US Chairman). Nothing for a couple of month and then on New Year's eve received a email asking me for a physical copy. I sent my physical copy and sent a follow up new feedback on the 14th because it looked like my statement pdf was not opening properly. I heard nothing but I received a statement today that mentioned Elite Status. Looks like I was upgraded on the 17th. I did credit 2 United Flights on December 23rd.