I think the bolded is intentionally misleading. The penguins lost in the first round four times this decade. How can you say that the hawks were dominant in the playoffs for 2/3 of the decade and the penguins were dominant in the playoffs for the entire decade when they literally lost in the first round 40% of the decade? Hawks lost the exact same amount of times in the first round but still racked up more cups and conference finals appearances.
Cups:
Chicago - 3
Pittsburgh - 2
SCF Appearances
Chicago - 3
Pittsburgh - 2
Conference final appearances
Chicago - 4
Pittsburgh - 3
Records
Chicago : 67-44 (60% win)
Pittsburgh : 66-58 (53% win)
I just don’t see any justifiable way to say Pittsburgh was a more dominant team in the post season than Chicago in this decade.