On page 183 there's a chart of pre-flop match-ups.

One of them is "Best (AA) vs. Worst (72) 89% vs. 11%.

You could compare this to a game in which you throw a die. If you throw 1-5, you win; 6, your opponent wins, and you go double or nothing on the bet after each throw. The game ends when you have nothing. After 6 throws, the game "probably" will have ended.