first alpine style winter ascent   
  
 
  
Are you saying Colin and Marko didnt climb the North Ridge in alpine style? If so how do you define alpine style?  
  
that's easy, no fixed ropes. 
  
  
Gotta disagree with you on that one. If they had continued to fix ropes up the ridge and establish camps sure but fixing a pitch or two because you dont want to waste day light during a weather window is fair game in alpine style climbing. It happens all the time like here: 
  
http://www.alpinist.com/doc/web08s/newswire-alberta-wintry-house-anderson 
  
“After 6 a.m. we woke and slowly worked out of our wet cocoons. Steve prussiked up 30 feet of rope we had fixed the night before. He had done the bulk of the hard leading the previous day, so it was my turn to take the sharp end.” 
  
Props to anybody getting on the CNR in winter but no way is what Colin and Mark did expedition style climbing.