Several divorce lawyers talked to the New York Daily News about what "trial separation" really means. The consensus? It's a euphemism for finished.
Divorce papers may not even be filed, but defense attorney Stuart Slotnick says "nearly 100 percent of the couples who agree to a separation end up divorced."
Celebrity couples are even more likely to take the trial-sep route, because revealing the news slowly de-sensationalizes the story, sparing fans a little and probably themselves more. Maybe publicity-starved artists — which I don't think David and Courteney are — score a little extra time in the spotlight, too.