The way I see it, good teams have bad games. Bad teams have good games. It is what happens in the last 6 minutes of those games that matters. How many times in the last 10-15 years have we played the game the Pistons played today? A game where we were the bad team/underdog, but then thoroughly outplayed a much better team for 36 minutes, built a good lead, and seemed like we had a shot to win, only to watch the better team tighten the screws in the fourth and put us away? I can't count even count how many times we were the bad team that failed to close.
Good team might not always play well for 48 minutes. What makes them a good team is that they forget the bad 36-40 minutes and close out the game with a W. We've done that a few times this year (Pistons, Hornets, Lakers, Magic). And that is the difference between 9-6 (playoffs) and 5-10 (lottery).