Don't get too boastful, Bruins fans:
The Bruins leading the Celtics and even the Red Sox is very deceptive.
Thus year, all Bruins away evening games have required only a 7 pm or maybe 7:30 pm viewership commitment.
Whereas Celtics are playing some games against the western teams, thus their fans have had to watch games starting no earlier than 8:00 pm to maybe as late as 10:30 pm.
Plus, as someone mentioned in the tweet, Sox have play several day games so far, even weekdays.
Plus, if the Bruins and Celtics had 6-7 games weekly as the Red Sox have, the Bruins and Celtics ratings would be much lower. Similarly, if the Red Sox only played three times per week, their rating would be much higher, likely well ahead of Bruins and Celtics ratings.
Also, much of the Bruins and Red Sox seasons have been played, establishing an allegiance from their fans. Sox are still warming up, and when they get to 80% of their season and are playing well, their rating will be much higher than now, especially with Yankees and even Houston games which haven't been played yet.
Yes, the Bruins get shifted to NESN plus when airing versus the Red Sox games on NESN, and that may hurt their rating. Celtics have an advantage unlike the Bruins when airing against Red Sox ganes, as the Celtics get to stay on their regular NBCSports Boston channel and not the "plus" version as the Bruins get moved to.