how do u figure that ? 270GH (40 miners) , my gfx card was pullin 3Mh, what gfx cards can do 2.7Gh

or are they posting crippled miners while using their own miners that do 1000x more hash ?
Your setup is broken. Probably you are using the wrong miner.
Since I got no experience with mining, take help from the community.
Also we're getting 6-7 gh per worker and from what I've seen, you can add multiple gpus in cgminer & that counts as a single thread.