The above answer gives a succint and thorough analysis of the "speaker meeting" in both Narcotics Anonymous, and Alcoholics Anonymous. I haven't any idea about how Cocaine Anonymous and other 12-step programs handle theirs, but I would suspect that it was the same.
(If you haven't heard other people's stories, so you know generally how it's done, and you haven't been clean and sober for at least a year, then why did you accept a speaking assignment anyway?)
