Waterloo Sunrise said:Well, its a shame we don't actually know what the wattage was.
3 riders never put their nose in the wind, and the other took a ride for the first half of the climb. If 6W/Kilo is the result of a simple VAM calculation (which tend to overstate steep climbs in any case) I consider is pretty likely that all 4 rode less than that.
I think he does make a good point about 4 of them riding well (drafting effects included) at the same time.