I still think the biggest difference in the last series was bad bounces and officiating. Those things tend to even out. Maybe the Sioux get a BS goal (F$#@%$ Shepard & Stoa), maybe the Gophs lose what should have been a goal (Oshie) and maybe the Sioux get some real lucky breaks (Prpich fails to clear 3 times or Irman gets a clearing attempt as he steps out of the box).
Tired defenders on big ice is definately a concern, but the Sioux have the skill to sweep. A sweep would be absolutely huge for either teams PWR.
BTW, how good is the WCHA when this is clearly the #2 series of the weekend?