1919A4 pending Dec 13, 2018, approved 12/1/19
M10 pending 2/28/19. Approved 12/10/19
To date, 1919 has taken the longest so far. These are on a 2 person trust. I was told that anything submitted during the "shutdown" period was taking longer. No idea why, but at least it's approved finally.
All of my items are on trusts, all except for the 1919 have been approved in 10 months or less. No idea why, but that's what I've seen.