Is Bergeron's line as good as Campbell's is bad?

Over at Pensburgh, they've broken down what every team's scoring by line is. Here's the chart about the Bruins:

As you can see, the 4th line takes up a pretty small sliver. "But Cornelius," you say, "they're the fourth line! They're supposed to be small." And yes it's true, but when compared to the numbers provided for the rest of the league, it's not so great. By my count, the Bruins 4th line comes in 8th-worst across the league in terms of scoring. Which is rough.

However, the Bergeron line shines bright. They're tied with Stamkos's line for 8th-best!

The second and third lines come in...well, middling. Remember how we used to have 2 first lines? By 5v5 goals, we have 2 second lines. I'm pretty sure that's good for a 3rd line and not great for a 2nd line. I dunno, I don't have any gripes there. The second and third lines round out the "8" trend by employing none other than "Crazy Eights," David Pastrnak.

Of course, none of this takes into account goals against. It's all by goals-for. Anyways, if you want to see what the other teams look like, I recommend heading over to Pensburgh and checking it out. Fun stuff.