not quite 5/21 but my SG is due 5/29-6/11. Bought it at 3:45AMEDT.
IMHO, which is based off of nothing but my critical thinking skills which are severely lacking from years of substance abuse, i think XX:15 and under has the most congestion. After that i think its going to open up a bit and we will see orders fly. Perhaps even sooner delivery.
It seems for SG they are doing a few minutes a week, stuck on xx:07-09 this week, but for me to be promised delivery in 4 more weeks, those minutes are gonna have to start flying in chunks. because 2-4 minutes a week won't make it to xx:45AM.