So, if you look at the 10-game streak last year 8/10 of those games, by using the the EH Expected goals charts to indicate "luck", were won by luck. Whereas, this season so far, only the Florida game stands out as lucky.
So the luck involved in their success, so far has gone from 80% (4/5) at their best last season to 16.67% (1/6) for whatever you want to call this current season. If you want to be critical of the Montreal game (I am not, they clearly played well in third), luck is still only 33.33% (1/3) part of their game.