you didnt have to be that fast, its only like that now slightly because most of the people who play on batle.net have been playin the game for years so know exactly how to build quickly. most of the time these days i play ums maps which can be absolutely anything. starcraft has one of the best (imo) scenario editors that has ever been released. i havent got a clue how to use it properly but there are maps out there that can do just about anything!! fancy a bit of diablo 2 rpg on starcraft anyone?
J