i'd say 15 minutes real time / round of battle is about average.
Wow! Why? What takes your group 15 minutes per round? [And this is not directly only at diaglo. Several responders here have suggested similar times.]
I (as a Player) was in one group that had time per round like this. The Players took forever to make up their minds and do anything on their turn, and the DM didn't force them to think and go faster. Every move a PC made in a round was a group discussion and committee meeting.
"I'll move over here and attack this guy."
"You could go over there, between those guys and maybe get a cleave."
"Or you could charge up to the mage and keep him from casting."
"OK, I'll go over here and attack the mage."
"You'll take an attack of opportunity from those two guys moving between them."
"Oh, well I'll move up between those two guys."
"You can't reach them with one move, you'll have to charge."
"But you'll take an AC penalty on the charge."
Etc., etc., by god, etc.
I timed one example: six 8th-level PCs vs. six normal skeletons took 2.5 hours for 5 rounds. Yes, you read that correctly: two and a half hours for six 8th-level PCs to take down six normal (human) skeletons.
We were investigating a "fort". My rogue climbed up the side, to the roof, to check for a way in. The other 5 PCs stayed out on the ground waiting for my scout report. I found stairs down into the fort and kipped down them to see if anyone was at the bottom. Six skeletons were there and started coming up to me.
The DM had the entire group roll initiative, even though I was the only one actually in the situation. Every PC took action on their turn. They started pulling out rope and grapple hooks, running around the outside of the fort, and generally trying to do *something* even though they didn't even know anything was going on up on the roof. My rogue tried a couple rounds to fight off the skeletons (rogue with dual slashing weapons is not real effective against skeletons). The other PCs were like the Keystone Cops in their attempts to get up on the roof and/or run around below looking for trouble. They would discuss actions each PC should take, whether to cast
fly or
feathers or just climb up. They'd question the DM on whether they could see into the arrow slits, and try different angles to see in. It was absurd. I had taken out 3 of the skeletons by the fourth round when the cleric made it to the roof and destroyed the other 3.
Two and a half hours to play out something that should have taken maybe 10 minutes. (And only that long because it was a rogue versus undead.)
It was like this for every battle. *Every* PC *had* to be in *every* round of *every* battle, regardless of their ability or need to participate. No one ever said, "I just delay" or "I'll just do nothing this round".
The straw that broke the camel's back in this regard was when we had just finished a fairly major battle. Two PCs were seperated from the main group, and were fighting some beefy mooks. Had the rest of the group just sat idle for a while, those two PCs could have wrapped it up in a couple more rounds. But everyone *still* had to do *something* during their turn. One of the Players had his PC race around the dungeon complex, alone, looking for enemies to fight. When he wanted to search a fireplace he found, during his turn in the round, and the DM let him, I cursed and said, "I gotta go." I never went back to that group (though combat time was not the only problem I had there).
If your real time per round gets above 1 minute per PC, you may want to take a close look at what everyone is doing in that time.
Quasqueton