When a team beats you four times in a season, including the most important game of the season, I think you have to conclude that it's the better team. I don't think the Pioneers are significantly better than the Sioux in any one area, but they did win the WCHA regular season championship, the Final Five championship and the national title. I'd say that they're pretty damn good.
I'm not putting down the Sioux in any way because they proved that they had real heart. A couple of bounces here or there and it could have been a totally different game. But ultimately, it's the score on the scoreboard that matters.