I think if you were to ask the average sports fan in the Northern US about the College Football Playoffs, they could tell you Oregon plays Florida State, Alabama is playing Ohio State and they would be aware of Jameis Winston, Marcus Mariota, Urban Meyer and Nick Saban. They could probably tell you Ohio State is down to their 3rd team QB. They could tell you Jim Harbaugh just got the Michigan job.
They could tell you about the NFL playoffs, that everyone should be afraid of the Steelers, that Carolina made the playoffs with a losing record, the wildcard games are this weekend. They would probably know all about Tom Brady, Oliver Luck, Peyton Manning, Aaron Rodgers, and Ndamakong Suh.
If you asked them about Jack Eichel, Noah Hanifin, Sonny Milano or Dylan Larkin or asked about the New Year's Eve game between Canada and the US teams, you would get a blank look.
Why? The NHL Network is the only broadcast outlet and it is not on the standard offering of most cable systems. You need to order a premium tier to get it, while ESPN, Fox Sports and NBC Sports are on standard tiers. Due to that many US sports fans might watch the Winter Classic yet never even know there is a World Junior Hockey Championship.