SoY-6: Online Tournaments "Seasons of year" - "Seasons" - Autumn Season 2009

Play a couple of practice games with someone, and you'll understand everything: on many maps, engagements with ranged units start right from the beginning, and if you also create roads to the opponent, the games will end very quickly.

This is definitely true; most games, if there isn't a serious early game strategy, can be finished on the first turn, even if the map is M or L in size. I remember games on Seven ending on turn 112, not to mention 113 on Guardians (this refers to skirmishes, not defeats), and aggressive rushes on MvM.