It`s easy to blame the two up front, an indeed they have a lot of the blame as they are the ones who decide to go or stay. But what is really interesting is why this happened. Early afternoon at OSL is not a very busy time of day. Weather was good. Daylight. I suspect the runways were black with good breaking action as well. Taxiways most likely in good condition with all signs easily readable. Having flown out of OSL quite a bit, I have found that when this kind of situation occurs (almost no traffic, good wx etc) you are given the "cleared for takeoff" amazingly early at times. Not trying to point blame here, but such a contributing factor could be a cause. Of course not the only one, but maybe one that can get the snowball rolling
