FLYHARDMO: " Better then everyone getting vaporized in an explosion"
The video of the China Airlines 737 burning to the ground as a result of a wing/engine fire is instructive. 'Explosions' when they occurred happened very late in the sequence. It also took quite some time for the fire to breach the cabin, as judged by smoke coming from the open doors.
In a situation where the fire services are very near at hand and the cabin has not been breached it seems very reasonable to hold off calling for evacuation, while continuously reassessing the safety of doing so. Judging by the almost universal calls of 'fire = evacuation' on this thread, I would suggest that this crew has definitely thought outside the box and the result was not one person injured.