That's not expected goals per minute that's xG differential from what I see on the site, presumably meaning the gap in xGF vs xGA per 60.
To give you an idea of how useful some of these stats are in determining who is "top 20", xGF% for the Capitals shows CMM 3rd on the team! But Ovechkin is 17th. And the rest of the rankings within that stat are similarly useless for setting a roster.
CMM was 112th in the NHL among forwards in xGF 5v5:
View attachment 591293
Based on CMMs actual xGF/60 he should've had maybe a few more goals than he actually scored all season long.
At about a half a goal more per 60 than Dowd, for example, if he played the same 68 games and had around 14min/game (like Dowd) instead of 10 and a half min per game, he should've had maybe 4 more goals all season IF he delivered at the expected rate.
But he didn't. His xGF predicted 12 goals in 68 games but he scored 9...so 25% less. That means we can probably knock off at least one of those "lost goals" he never scored due to playing 10.5min instead of ~14min per game
So yeah, maybe 3 more goals all season? Guy goes from a 9G scorer to a 12G scorer? Is that worth everyone burning down the boards with daily rage posts?