Yes, but to my knowledge (for whatever my knowledge is worth on the subject), any stretching of the truth were a function of time, simply forgetting exact details. A non-trivial amount of of Solzhenitsyn's anecdotes in Gulag Archipelago were given to him verbally from other prisoners, so Solzhenitsyn's burden became remembering all of the nitty gritty on top of, y'know, literally living in a Soviet prison camp.