mine actually took a full 30 days from the time i resubmitted. (821d approval from yesterday)
__________________
Case type:B2 Overstayed
Sent-8/15/12.Resubmitted-8/27. Vermont-9/7.
Biometrics-9/17. Approved 9/27. EAD10/1. Approved for instate tuition in VA: 12/17/12 !!! RENEWALS so far 9/27/14, 9/04/16 and NOW 8/12/18