Was in Same Boat
I had the same problem, we are also the family of four,
got PP stamped on 09/28 in Phillidelphia and got my and two
sons GC on 12/12/01 and got my wife\'s GC on 01/22/02.
Do not worry, if you do not get her GC after 60 days from
the day you got yours, then call INS.