I think they approve as they work on the applications not by the end of the day. I am following alot of groups, all shows that people get approved throughout the day.
It sucks to see they jumped maybe 7 days of applications 21 june-28 june and started on july, not sure about how they operate, but it angers everyone who applied before and still waiting. MY noah 1 is on the 23rd of june and still waiting. coincidentally, my sister applied also for her fiancee and her NOA1 is on the 27th of may, she is still waiting, she is seeing june approvals and now july, she feels left behind. now I am starting to feel the same...