I was over on the CMP forum last night and it looks like mostly field grades going out this week (both shipping and DBU emails). A lot of speculation that it means they are near the end since last week it was service grades with new wood going out and now that they are onto field grades they are hitting the bottom of the barrel. I don't know about that... might just mean the last few pallets of carbines they processed ended up being field grades IMO. Time will tell.
I think some of the people getting FGs now had DBUs from 3/22, so CMP did appear to send out all the SGs first before they sent out any more FGs, but that doesn't mean they won't go through that iteration again. Hopefully, as carbines leak in from the Army they just go back to their 2/1 and 2/2 orders. They're still calling up people who ordered Aguila .22 three years ago to offer them whatever ammo they get in, so there is some precident for it.