You are right, it isn't official, but I would say its next to impossible for the Packers to make the playoffs. With 8 games left, 6 of which the Packers will be underdogs (based on current play). They might be lucky to pick up a win against either the Bears or Lions. If I had to make a bet on the Packers finishing with 3-5 total wins VS 6-8 total wins, I'd put all my money on the first bet.
EDIT: After looking at the bottom 10 or so teams remaining schedules, I honestly believe that the next time the Packers play the Lions, they might be playing to decide who gets the 1st, 2nd or 3rd pick in the draft. Go Texans, Panthers, Raiders and Steelers. I will be pulling for these teams from here on out.