Also, it seems pretty clear 3 is too few.
I tried it for the first time tonight. It was pretty much autopilot to populate as quickly as possible. All three players got to 13 population on the same turn. Two of us had 1 food left, but the other guy had a higher numbered tech card. So he won on the second tiebreaker.
EDIT: Nevermind. I looked at the rules myself, and I realize now that the people who taught me the game deeply misunderstood some important details.