By my count, this Caps team has played in two game sevens over the past two years, and has faced elimination seven times (games 5,6 and 7 vs. both the Flyers and the Rangers, and game 6 last night). In those seven games, the Caps are 6-1.
In contrast, the Crosby/Malkin Penguins have played in zero game sevens over the last three years, and have faced elimination only three times (2007 vs. the Senators, and games 5 and 6 vs. the Red Wings last year). In those three games, the Pens are 1-2.
Food for thought.