I can see the flow from adcom's perspective.
- Many of us are R1 applicants
- R1 accepts deposit deadline was a week or 10 days ago. So they know who from R1 that was accepted is finally attending.
- R2 regular decision date is 21st March.
- By April WL update date, adcom will have a good idea (Post R2 deposit deadline) about the overall class picture.
- Then they can decide whom to admit based from the R1 and R2 WL pool.
I see the flow, but that doesn't help when you're on the waiting side. Bottomline... nothing till we file our taxes (15 April).
Best luck....