Benefited a lot from the info and discussion in this forum, and just want to provide my datapoint.
* Submitted DS260 and documents: May 12 2022
* Email was sent to NVCExpedite@State.gov: May 27 2022
* Date NVC Acknowledged and Replied: May 27 2022
* Recevied DQ'ed email: May 30 2022 (very surprised because it was Sunday US time)
* Date US Embassy/Consulate Approved Expedite: May 31 2022
Reason for expedite is medical reason (def not life-or-death situation) and provide a very simple doctor note.