Reading the transcript of this VP debate from 1992, by the way, Admiral Stockdale doesn’t even mention that he was a POW for over 7 years.
Possibly because he felt he’d accomplished things in his life since such that the years he spent as a prisoner were not the largest accomplishment of his life.
I’ll update with a link to the Biden – Palin VP debate when a transcript is available.
(And, update: Saturday Night Live Vice Presidential Debate Transcript and non-US accessible video (comment 2). Also, discussion whether this successful satire makes Palin more lovable.)