Don't forget Jordan Schroder's performance in the World Jrs, he holds the record for most points (overall) by any US born player. Also in 2009 Cody Hodgson outscored Tavares and Eberle. Hell Anton Rodin got 10 points in 6 games in 2010.
I would say that while it does showcase some skill, it is not indicative of success at the NHL level.
Nylander, Forsling, Domi and Petan may be tearing it up now, but it's guys with speed AND size and strength like Virtanen that help you win in the playoffs, especially in the West.