I'm curious where the people who think the Celts are going to win ~60 think the Celts will rank in Offensive Efficiency and Defensive Efficiency, and what the point differential will be.
Last year, the Celts were 8th in offense and 12th in defense.
They had a point differential of +2.7, which converted to a Simple Rating Score of 2.25, which was 8th best in the league.
The San Antonio Spurs, who won 61 games last year, had a point differential of +7.2, which converted to a Simple Rating Score of +7.13, 2nd best in the league.
The Rockets won 55 games and had a point differential of 5.8, and a SRS of 5.84. That was 3rd best in the league.
The last time a team in the East won 60+ games was in 2015 when the Hawks won it with a point differential of +5.4, and a SRS of +4.75.
Prior to that, the Heat won 66 games in 2013 with a SRS of 7.03.
Based on all that, if you're saying the Celts are going to win 60, you're saying they're going to at least double, possibly triple their point differential from last year.
You're also saying that the Celts will likely end up in the top 5 in either defensive efficiency or offensive efficiency.
That would be a fairly major leap from last season.