The percentage calculated by USCIS is surely wrong. It’s NOT 16% higher than before, but 4% in reality for AD. Americans are bad at maths :( but good luck everyone. One’s future/destiny should never depend on a lottery.
“4/24/19 UPDATE: No receipt notices came in today’s mail, and we did not receive any premium processing email notifications as of 2:00 pm today. I’m sure we’ll start receiving them again soon, things probably slowed down over the Easter holiday.” From that website