回复：本人公民,父母在办绿卡,取过指纹了,那位大侠可以告诉我他们还要等多久?多谢!

Just share my parents' case to give you some idea.

Application submitted mid-January, finger print taken early Febuary, second finger print taken late May (not sure why twice), application approved late June (got the card in the mail 2 days later). I think it probably would be quicker if no second finger print needed

No interview.

Hope this helps.