I'm running 560 Gh/s and only getting .04 BTC / day. Man, I miss a couple months ago. And people said I could run this miner for several more months. I doubt that.
Something is definitely wrong. You should be getting .09 btc/day with 560 gh/s.
... don't forget to:
1) subtract pool fees
2) subtract your own down time
3) ... ... ... ... ... ... understand variance ...