USCIS最近效率看来提高了
2002年开始办, EB2, NSC
RIR priority date: Jan, 2003
Philly BEC
45-day letter: Oct. 14, 2005
LC certified: Jun 29, 2006
140 & 485 concurrent filing RD: Aug 25, 2006
140 premium processing: Dec. 2006
140 RFE: Jan, 2007
140 AD: Mar. 22, 2007
485 RFE: Apr., 2007
485 AD: May 4, 2007