Lately I've been experimenting with the 7rr. If you expand behind it how much damage needs to be done to not be so far behind you're better off just leaving? I've been experimenting with it today and yesterday and have found great success with it vs top 8 diamonds through top 25 masters on the ladder.
The funny thing is I have NEVER just outright won with the first push. Even if I do minimal damage (a gateway, a forge, etc) I'm still even on workers at the 7 min mark, and they've had to invest enough into defense to not leave me light years behind my opponent. It's the same concept as forcing a zerg to stop droning isnt it? Force a terran/toss to invest in cannons or bunkers or unit cycles NOW instead of teching or ramping up production.
Am I wrong about the 7RR being a decent opening zvp/t? And what other aggressive builds are there for zerg to use and abuse early game?