回複：本人公民,父母在辦綠卡,取過指紋了,那位大俠可以告訴我他們還要等多久?多謝!

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.