The real approval message should carry something like "On ****, this case has been approved...".
I am very very sorry to tell you this and break the dream of our many petitioners who deserve GCs and have been hurt so much by the retrogression. But it should be more helpful to live in reality strongly than in a virtunal world that is not real.
But hi, who knows what USCIS will do next. Maybe you will get a real approval notice next week. Then please don't foreget to share with us:)
Good luck!