The way Sony marketed God of War was pretty starved.
They kept that game under wraps for a long long time only to shown off for the first time in E3 2004 and then barely anything since.
Like no one really remembered God of War being talked about much after E3 2004 did they? Just look what was being shown. Half-life 2, Halo 2, RE4, MGS3, Zelda, GT4, DMC3, FFXII....so what is this unknown game shown behind closed doors....a lost blip on the radar. Yet it's this same game that sort of appeared out of the blue and took many praises and awards later on for itself just like that.
Sony did barely any promotion and media explosion really until like a month or so before release. It was the demo they mailed to PS Underground members that truly sparked great interest. I clearly remember the thread, and it was near unanimous how people liked the demo, and that was just the taste of the first area of the game. Word of mouth spread.
Games like RE4, Tekken 5, Gran Turismo 4, Devil May Cry 3 were/was released around that 1st quarter time, so how would a brand new IP fair in such a release schedule?
The game released and the it was getting great reviews across the board, and for a brand new IP it managed to clear more than half a million domestically. It found new life again when it hit GH. And of course later on several gaming awards.
GOW2 seems to be getting the type of media and promotion GOW also should've had when Sony fully saw what they now had.