He isn't. He's producing substantially less. Almost half his points are secondary assists. He plays on a way more offensive team. Coronato is lighting up the AHL as a first year pro. You'll see next year. I like Barlow more than I like McGroarty honestly. Primary points are very important at levels below the AHL. Barlow has almost all primary assists and goals. I'm not saying McGroarty sucks. Just that he's more of a complementary facilitator. They just aren't as valuable as drivers.
Right so I'll do it then. McGroarty has 13 secondary assists this season, meaning 21 primary points in 19 games. So before even looking at Coronato's primary and secondary points McGroarty is scoring primary points at a higher rate than Coronato scored total points at the same age, including secondary. I'll do my best to find game logs from Coronato's season but even if I can't your "he's producing substantially less because of secondary assists" argument is already thoroughly debunked.
EDIT: Coronato had 31 primary points in 34 games. Which admittedly is impressive, but also falls well short of McGroarty's primary point production. Coronato was also the 3rd best producer on his own team, McGroarty is producing at the highest rate in the entire NCAA. In fact he's producing at the highest rate since Kyle Connor.
Is Coronato scoring 31 points in 29 games that much more impressive than Lambert scoring 28 points in 33 games while being a year younger and on a lower scoring team?