My experience is here...

My I140: 08/2005 I485: 09/2005, I140 approval: 03/2006, AP: 04/2006, went back for marrage: 05/2006.
LP came: 06/2006 (H4), could not file petition due to PAIQI... RFE to I485: 05/2007, LP filed I485: 06/2007, my I485 approval: 07/2007. LP is still waiting for her GC.