So far this groups payout address has received over 911 BTC to date, with the first payout to that address at 10/05/2013, roughly 63 days of mining, which is about 14.46 BTC per day of mining, not too shabby. In comparison my little rig at home has been earning about .01 btc per day with 12GH, it looks like with the new diff of 707MM it will be dropping to .01 btc every day and a half, still though each mBtc helps.
Personally if I get another 10+ btc out of this group buy I will break even in bitcoin and be a very happy camper, regardless of the timeframe.
Oh, you mean like this: https://i.imgur.com/CSdlnXB.png
(0.3 BTC share)