Bertuzzi has scored a point every 29.1 mins of ice-time last year and 36.3 mins of ice-time this year. Samuelsson has scored a point every 30.7 mins of ice-time last year and 1 every 51.5 mins this year.
For the record, quoting this year's statistics for these two makes little sense; they've each played very sparingly due to injury.
Either Datsyuk or Zetterberg (or both) have scored a point on nearly 60% of our goals so far this season. To be exact, it's 57 goals out of 99 total.
"I like our depth."
I've got news for you: if your two top players each center a line, and if they both play on the first PP unit, they're very likely to cumulatively play into a majority of the team's goals.