No, it suggests there is simply a lower likelihood of a NA player busting.
A North American player busting stays in North America, staying within view of NHL GMs if he sticks around the AHL long enough to get a chance at the NHL again. A European player busting means going back to Sweden, Russia or Finland, never to be seen again.
Given the exact same talent, a North American player capable of spot duties will fight his utmost to stay in the NHL, whereas a European has more options. So while a NA bust might play 50 games or so as a 4th liner on a weak team, that same Russian could go back to Russia, earn slightly more money but more importantly play 1st or 2nd line minutes on his Russian team. So one (the NA player) ends up with 50+ games on his career basically because he continued to try for the NHL for another 5 years, while the Euro players have no problem with going back home earlier and being stuck at say, a cup of coffee in the NHL.
So the context by which to describe "busts" and "likelihood of busting" in this scenario is not by and large equal between one and the other.
If only they had Russian Jonathan Toews. There would be no more factors because then everyone would know how to play hockey the right way.
They did, his name is Pavel Datsyuk.