I sent my N-400 on Feb 15 to Lewisville, TX by USPS Express Mail. The USPS tracking service reported that it was delivered to Lewisville, and then forwarded to Flower Mound, TX (which is a city adjoining Lewisville). Has anyone else had this experience?
The USPS tracking info notwithstanding, I have not heard from USCIS yet. However, only three business days have elapsed. It does seem from a few reports here, though, that Dallas is running behind some.