From The Pensblog:
It is no secret that "players and people who we think are Penguins" are North Americans. Especially in the Dan Bylsma era, the Pens' mentality has shifted. Their top priority has been to stock the organization with aggressive skaters who aren't afraid to forecheck, throw a little hit, get separation, and get a cycle going. It's Bylsma's system, the Pens have built the entire organization around it, and Europeans simply don't fit the bill. Having said that, Shero and Co. did recently bring Tommy Westlund aboard, an amateur scout keeping an eye on Europe.
Upon digesting all of that information, we said wait a minute. We have the Internet. We have free time. We should do some analysis on the Pens' rosters throughout the years. We ended up doing an NHL-wide data set, using specific criteria, to see if there are any noticeable trends in the NHL when it comes to the European/North American makeup of rosters.