How do you know they are actually mining for you and not just creating payouts to simulate mining?
lol

Especially as the deployed boards are most likely 360GH (same as demonstrated) and the allocated GH is showing very close to 600GH with some variance. The math don't add up unless all boards are underclocked to 300 GHash.
Someone should try pointing their units at another pool so the BFL pool software can't fudge the numbers.