here is my timeline:
Application sent: 11/19/12
Received: 11/23/12 (texas Service Center)
Biometrics letter received on 12/03/12 for 12/26/12 did walkin on 12/05/12
RFE:01/04/13, received letter:01/10/13, RFE sent:04/20/13, RFE delivered by USPS:04/23/13
Daca & Ead Approved: Today 04/04/13