I also had a submission go QC/F on a Saturday. I actually called customer service today because, go figure, I'm scheduled to be out of town later this week. Wanted to see about upgrading return shipping time. Spoke with a nice gentleman who checked on the order and told me it was in the mix of being done, which I took as likely being done today.
Went back to check status just now and it shows shipped! Restating for all.
Economy Order (14 cards)
Sent: 2/26
Marked Received: 3/1
Scheduled for Grading: 3/12
QC/F: 4/13 (skipped grading step altogether on tracker)
Shipped: 4/15
I have a few others still being worked on so will continue to update as these progress.