came to the US on J1 visa in august of 2005
J1 visa expired in july of 2006
met in october of 2007
got married in november of 2011
became a permanent resident in june of 2012
conditions lifted in december of 2014
became a U.S. Citizen in August of 2015
All the same,I call them and they said that if nothing comes from them until 4/30/2012 to call them and go for faster process.You should do the same they're very polite.