[skwb]

I don't follow gaming balancing too closely, but I (naively) assume there's some reasonable analytical solution to find tuning. Like I would imagine if you're Blizzard and have logs of all the data, you could just regress race attack/defense/movement/etc. stats to find a potential equivalence point.

I suppose there's lots of interactions, but finding "well Zerg beats Protoss X% of the time", you could balance by messing slightly with resources or blanket buff.

[glun]

Starcraft is generally balanced by adjusting the map pool rather than the races.