@Ace - Not true. Read the spoiler threads from recent gotm's. This is by La Fayette from gotm46:
"I would probably have finished conquering before 300AD without respawning, but I spent more than 5 centuries finding and destroying those newborne settlers (certainly more than 20 = )."
In the same gotm, I had only ONE respawn, which had almost no effect on my conquest date. I don't believe bad luck from huts, barbs or battles could slow a strong player down by 5 centuries. But I do believe La Fayette's story, and it is not hard to find others.
Sorry, but I've read this thread a few times and see no reason for respawns. The best one is variety, but you don't put mud in your food for variety, do you? Some people seem to have a problem with early conquest dates, which makes no sense. Everyone knows that landing games take longer, so there's no need for EL and EC players to compete.