Ok, by 'rushing' I didnt mean a classic zergling-rush. I meant a constant, fast-paced conquest. And, of course, while conquest and hoarding arent exactly comparable, they are still two different ways of getting stronger.
Its like saying that building new bases and researching new technologies arent comparable... But in fact, they are. Research/expansion/rush, three basic paths in RTS.
And... Competitive games which dragged all the way to 80+ turn were won without generators? I find it rather hard to believe, sorry. Unless it was, say, Ermor/Rlyeh, of course.
Or maybe it was a blitzkrieg, where one clearly dominant player crushed his opposition one by one, and they couldnt unite against him until it was too late? Then it wasnt a competitive game, sorry. I've seen one such game; I was in quite a strong position, but SUDDENLY I found out that leading player who already conquered ~half the map is supported by everyone. Instead of attacking the would-be winner, his sattelites were attacking his opposition... but thats another story.
What I want to say is that stopping such a dominant nation is rather hard even now, when you can genhoard. Without genhoarding, it will become futile.
Of course, that will also shorten games and reduce the MM, which is kinda what many players want. I just hope that it wont become a new standard, because I enjoy MM and complicated situations. When I'll want to play with just my national troops and low-level combat evocations , I'll play... well, warcraft.