i don’t see him shaving that much… perhaps 15-20 seconds faster is realistic (time lost with the flag and the finish deceleration). See my reasoning below.
also, understand that my quick comment you quoted was made DURING the live broadcast to on-the-fly evaluate northug’s skis, NOT the hellner’s potential performance. it was based on the occasional on-screen splits following each time they entered the stadium (3 per leg)…
it turns out, my observations were reasonably accurate based both on the post-race comments and the official race splits
http://data.fis-ski.com/pdf/2014/CC/3062/2014CC3062RL.pdf
2 more points...
Point 1.
when hellner started his 4th leg, he had 14.3 sec on vyleg. obviously he tried as hard as he could to stay away from the chasing russian. and he succeeded. vyleg himself confirmed that after 5 km of hard chasing and losing another 2-3 seconds, he gave up and decided to change his tactic to safeguarding silver against the frenchman. comparing hellner’s leg time (21:25 -fastest in his leg) to vyleg’s (21:38) who skied tactically last half, it become apparent that hellner could only gain what he decided to waste in a celebration.
the second point- more important -
northug was still unremarkable, despite having good skis. it is inarguable that he went full tilt on his leg to improve norway's place and, more, importantly, to rehabilitate his own shaken image.
here are cold numbers from the official results of the two skating legs.
1. LEGKOV Alexander 20:33.4
2. DUVILLARD Robin 20:55.4
3. SUNDBY Martin Johnsrud 20:56.8
4 CLARA Roland 21:00.4
5 OLSSON Johan 21:00.4
6. JAKS Martin 21:25.2
7 HELLNER Marcus 21:25.5
8 LIVERS Toni21:32.7
9 NORTHUG Petter Jr.21:36.0 (3d fastest in his own leg)
9th fastest and over 42 seconds slower than his compatriot who's skis were also initially declared 'bad' by vidar løfshus !
http://www.langrenn.com/kan-ha-funnet-loesning-paa-smoerekrisen.5420164-313274.html
this was how the norwegian competitors analysed his performance as opposed to loving fans fed the hype. in sochi, petter was a sorry sight on supposedly bad skis. He remained barely competitive on ‘good’ skis. and if we add several who dropped him in the skating leg of skiathlon (cologna, cherno..to name a few), the true picture emerges - an over-hyped, big-mouthed skier who never qualified for sochi by right. at least, it is 100% true in sprints.