TNT has seen averages of almost 1.76 million viewers per game, while ESPN has also seen 1.48 million on average. Out of this, 11% are individuals who are new to watching the NHL playoffs, more than 150,000 on average per game.
These numbers are way more than any recorded data from the first two rounds of the postseason in NHL history. If the third round continues, which it will if the Oilers and Avalanche series continues to live up to the hype, it should have no issue continuing this trend.