I filed my I140 and I485 at Nebraska several weeks ago.
Nebraska I-140 processing was pretty good and they are working for only 2 months old ones, but the I-485 (Employment Based) processing times were listed as follow and it made me disappointed a lot.

DATA ENTRY – 12/20/2005 : 04/29/2004
DATA ENTRY – 01/06/2006 : 05/15/2004
DATA ENTRY – 01/24/2006 : 05/15/2004

But, I found it advanced 1 year and 10 days just in 2 weeks as follow.

DATA ENTRY – 02/08/2006 : 06/25/2005

I’m not sure is this real data or they made mistake before.

Anyway, it looks good to me.

http://www.visatrax.com/web/frame.asp?menuSrc=PROCESSING_TIMES&tocSrc=/web/processingTimes/toc.asp&contentSrc=/web/processingTimes/main.html

https://egov.immigration.gov/cris/jsps/ptimes.jsp;jsessionid=baTdIhjYKt7d

저는 서류준비중에 있는 사람이라서 확실하게 말씀드릴순 없지만, 제 주변에 최근에 영주권 받으신 분들을 참조해보면, 위 날짜가 맞는 것 같습니다. 참고로 저도 NSC 입니다