When the 1976 WOC relay was held at Culbin the men's race was 4 * 10.8km on a predominantly white map. The Swedes were runaway winners in 4 hrs 10, the Norwegians got silver in 4 hrs 19 (i.e just on 6 mins/km). The "breakthrough" Brits in 6th were a further 23 minutes back (i.e. they averaged over 70 mins each), and the Australians in 9th took an astonishing 5 hrs 39 (i.e just under 8 mins / km)
Re-run it today and I'd expect the winners to be anything up to 30 s/km quicker - the 9th place team would be 2 mins/km quicker
