The difference between "good" and "decent" teams is not insignificant and the gap between "good" (DAL/COL) and "bad" (CBJ/SJS) is vast.
There's a 20 point difference from the top of the standings to the bubble. There's another 20 points (in the East) to the bottom of the standings - it's wider in the West.
Teams with 14, 15, 16 more wins in the W column are significantly better.
Again, not to say "bottom" teams "can't" beat "better" teams, it's whether they can do it 4 times each against "better" teams in the playoffs that matters.
Chicago, Anaheim, and San Jose seem to be working on a method. So's Columbus, as if that counts for anything.
But, hey, the Flyers have a 6.2% chance to make the playoffs. And they just beat the Rangers.
Anything can happen.