Here's the problem with that concept: It can't be a true rivalry unless both teams do some winning - and the Penguins appear to have no intention of letting that happen.
A year after dispatching the Flyers in five games, they are on the precipice of doing so again after a 3-1 victory last night at Wachovia Center.
This was, indisputably, the Penguins' worst effort of the series, but goaltender Marc-Andre Fleury stole the game, making 45 saves on a night when his team was outshot, 46-26.
A fierce penalty-killing unit did its part, as well (Jordan Staal played 7:58 shorthanded), snuffing all eight Flyers power plays. Sidney Crosby, Tyler Kennedy and Max Talbot scored the goals. Talbot's was an empty-netter with 51.3 seconds left.
The outcome left the Flyers utterly befuddled.
"I think we deserved a better fate," said center Jeff Carter, whom Fleury stopped five times. "Their goalie won them that game; that's for sure."
The series shifts to Mellon Arena for Game 5 tomorrow, when the Penguins could end the series and preserve valuable energy.
Last night, Fleury made a half-dozen Grade-A saves in the second period alone, including four on hard one-timers from the slot, and one on Arron Asham alone at the side of the net.
Philly's theme now is that if it just keeps playing this way, well, good things will happen.
"It's a deep hole, yes," said center Mike Richards, who saw Fleury somehow stop his one-time attempt on a third-period power play. "We also started the season 0-6 [0-3-3, technically]. Pretty big hole there, too. I have confidence if we play like we did tonight, this series could be a long way from being over."
OK, but here's the thing: The Penguins have the better goaltender.
Crosby scored the game's first goal at 3:19 of the second period when he drove hard to the net and took a Chris Kunitz pass.
Fleury continued his incredible play in the third period, turning back prime chance after prime chance before ex-Penguins farmhand Daniel Carcillo finally got the Flyers on the board - on their 39th shot - at 11:44, just as the crowd had begun to turn on its team.
Carcillo proceeded to implore the crowd as he sat on the bench.
But Fleury held on, helping the Penguins improve to 7-2 in nine playoff games against the Flyers over the past year.
Sure, this has been a much more entertaining series than last year's. Much more intense, too. It won't end with a 6-0 humiliation, as last year's series did.
But unless the Flyers find a way to crack the code, it'll end at precisely the same point.
What kind of rivalry is that? *