I just wanted to let you all know that Nebraska seems to have picked up! I overnighted my I-751 package on 3/19 which was obviously recieved on 3/20. My checks were cashed on 3/26 and NOA was Mailed on 3/23 with an NOA date of 3/20! I'm super excited because my GC expires on 3/31 and I have a trip overseas booked and paid for on May 3rd.
Just thought I'd share the news with you all and hope to see others get similar results!