That's just because that poster does not understand what that means and the miner consumption vs power consumption at the wall, there is nothing shaddy here, with the drop in hash rate, there is also a drop in power consumption.
With a 90% eff psu that would come up to 1157watts at the wall~ down from 1240~ and the hashrate goes down at the same ratio.
In fairness the efficiency of the B6 appears to have been lowered by 10% (Power Efficiency: 0.25 J/GH + 10% (at the wall, etc...) And chip count was reduced to 135 vs 165 for earlier batches. Speculation is that this is to decrease the string size in order to increase chip voltage, due to some issues that seem to have come up when PSU's put out slightly lower than 12V. There were clearly some QC issues in earlier batches, hence the two different hashrates in different batches, though my 2x B1 S7's are hashing away at 100%, and even OC'd a bit to 5TH/s without a hiccup.
3x 54 =162 chip not 165
I think that the new 4,05 TH/s S7 can be better as old 4,86 TH/s
I a world where the eficiency is so important is understandable that a company launch a worse product after one better... I wanna wait and see too.
I think they need to change this BM1385 chip in order to overcome with heating and efficiency issues. At least in S8 maybe! 
