[jtolmar]

Currently bot micro can perfectly time hit and run "dance" maneuvers on all their attacking units independently (several top bots are Terran and do this with Vultures). But solving this in a way that takes terrain into account is much, much harder, and a skilled human could chase the whole army into a wall and kill it.

Similarly there are worker rush bots that do some impressive things against other bots, but positioning is hard and a skilled human can beat the bot by clumping its workers up in the right shape.