^ My friend, I have had the best luck in dungeon crawls by using personal messages to convey information versus public threads. The person in the lead never knows what the person in the rear knows, and vice-a-versa, until they communicate it somehow.
This makes the pace more of a function of player mandated actions than the flow of info from the GM. It also allows the GM to convey large amounts of specialized information without long drawn out and elaborate public posts. Let them decide to do things as a group, not you.
I think it does a great job of replicating real life too. I've had players get separated from the group because they've stopped to examine something and the rest kept going, not knowing they've left someone behind. It works even better to replicate the fog of war, even to the point of causing PC's to fire on each other without realizing it.
And there's something about it too that makes it even creepier to hear only your own thoughts as a player than the thoughts of everyone in the group.