The club had an 8000 points a side with 4 players per side a couple weekends ago. The mission was a simple Kill! scenario pitting the forces of evil with : Undead, Undead, Abyssal Dwarves, and Varangur. Against the good and neutral forces of: Elves, Kingdoms of Men, Force of Nature, and the Heard.
We probably didn't start deploying till around 11:30 and finished around 4 after 8 turns. The Undead and Varangur near the castle had pretty much routed the Elves and Humans across from them while on the other end the tide of battle was reversed and the Undead and Abyssal Dwarfs had been routed by the Forces of Nature and the Heard. I was really impressed with how the flow of the game was maintained even with that many players and I would definitely do it again.