They are good. What I said was that they're not that good. Boston is the only team right now that I'd put into another category. Everyone else (including the Devils) is in the same group until you get to the Blue Jackets, Islanders, and Hurricanes of the league.
I forget who it was, but someone said something in the GDT last night which resonates with me and is appropriate here: this isn't football, where the individual games count for most of the season. There are 82 games in an NHL season, spread out over more than 6 months. Drawing conclusions based on one game, such as by saying things such as "they beat a top team in the Bruins today", is a mistake.