Slynky:
It all depends on the starting position and the tactics used. With a decent amount of breathables close, 30 K at turn 30 is fairly standard (I have done much more and much less in KOTH games). It all depends on available planets and how much resources you use for exploration/colonization and defence. The important thing in the first 30 turns (that is if you don't have your adversary next door
) is to grab as many systems as possible.