My youngest son is home for the weekend (4 day pass from the Army). You wouldn't guess that he left under such rough terms. Still, we keep the expectations low and things generally work out.
His mouth is not what I would pick, but is not as bad as it could be. He has clearly strayed at least some from our guidance, but I will bet more of it is there than we expected.
Time will ultimately tell how much really sank in and how much he reverted to the habits of the birth family. They are not all bad, but a few are, in my opinion, so it is a bit of an emotional hit to realize.
Of course I shouldn't worry, but what true father doesn't have some concern?