Bjørgen wasn't at the Tour de Ski in 2011, so those times must be 2012, no?
Also, Johaug put way more than 11 seconds into Kowalczyk that day in 2011. She started the Alpe Cermis stage at 3'29 and crossed the line at 1'21. At the timecheck at 5,6km (so roughly the start of the climb) she was at 2'35, so that would suggest Johaug climbed the Alpe 1'14 quicker than Kowalczyk in 2011.
http://www.youtube.com/watch?v=4XqiJIUSu48&list=HL1357240047 (part 1 of 3)
At the same time, that year Kowalczyk had an almost impregnable advantage by the time they got to that stage, while Johaug in 5th was almost inevitably going to pass Majdic on the climb and with Folis and Longa both well within her reach. Similarly you could argue that last year Kowalczyk raced the Alpe harder with the race on the line, while Johaug had nothing to race for. So it's hard to tell what the time gap would be if both were going full gas because we don't know if Kowalczyk went as hard as possible in 2011 or if Johaug went as hard as possible in 2012.
Also, Johaug put way more than 11 seconds into Kowalczyk that day in 2011. She started the Alpe Cermis stage at 3'29 and crossed the line at 1'21. At the timecheck at 5,6km (so roughly the start of the climb) she was at 2'35, so that would suggest Johaug climbed the Alpe 1'14 quicker than Kowalczyk in 2011.
http://www.youtube.com/watch?v=4XqiJIUSu48&list=HL1357240047 (part 1 of 3)
At the same time, that year Kowalczyk had an almost impregnable advantage by the time they got to that stage, while Johaug in 5th was almost inevitably going to pass Majdic on the climb and with Folis and Longa both well within her reach. Similarly you could argue that last year Kowalczyk raced the Alpe harder with the race on the line, while Johaug had nothing to race for. So it's hard to tell what the time gap would be if both were going full gas because we don't know if Kowalczyk went as hard as possible in 2011 or if Johaug went as hard as possible in 2012.