Which would be one argument in favor of wetting down your clothes before hand.

Personally, I'm not sure which answer is correct--wetting down or keeping dry. What's proper for a fire fighter could be a very different application than these office workers. A fire fighter may need to stand their ground in the vicinity of flames and great radiant heat for some time, while the workers are more interested in just quickly getting past hazards like that wearing fairly flammable clothing.