i had a 9 month gap from jan of 2007 to October of 2007, no RFE. I was actually surprised they sent me no RFE.
__________________
Application Received: Nov. 30th, 2012
WAC Service Center.
Biometrics: December 27th, 2012.
Approved: March 11th, 2013
SSN: 3/18/2013
CA ID: 3/26/2013