I don't agree with that guy's rankings but there is such a hivemind about these things. Any takes outside the box are met with replies such as yours. Last offseason 97% of hfboards predicted the Devils would make the playoffs. Around 2% predicted the Caps would.
The balance of power IS going to start shifting in the Atlantic some day soon.
I'd argue both Tampa and Boston are starting to ice the kind of rosters that, while not bad, are certainly more vulnerable if they suffer injuries or underperformances. Florida's most likely still going to be very good, but cup hangovers have happened in the past and it wasn't that long ago they made the playoffs with just 92 points. Not even Toronto feels like that much of a dominant force considering the constant turmoil surrounding them and the fact they were tied with Buffalo for the 4th most Regulation Wins in the division last season.
The dominance that these teams have had is already a statistical anomaly in the NHL (they are 4 of the 7 longest playoff streaks), and not even Montreal is in full tank-mode any longer. There's not going to be much room for any of them to slip without someone jumping them from below.
"No shot"? That's too much confidence in something that's a question of "when", not "if".