Also makes a difference for colony jumping: building an arc from a planet as soon as you can. Means you get those few anti-matter you need later, so takes a few turns more to jump the arc around.
I actually don't do that. As soon as the colony is founded, I build bulkfreighters and send them back to the nearest big planet, where the steel helps churn out more arcs. On those planets, a couple arcs in population are barely noticed. On a fairly new colony, it slows down population growth.
