I think they must be burning in everyone's Neptunes before shipping next week. Holy shit! That is a bunch of new Hash power hooked up to the network.
That's the most likely explanation, especially since the number fluctuates both up AND down (currently 6%). At least, I EXPECT them to do a 24-48 hour burn-in on the boards before shipping them to me.
You guys are too trusting.
There are two options here:
1. KNC are building their own new datorhall(s) first and mining the shit out of it.
2. They are burning in customer rigs. If they are burning in customers rig, HOW COME THEY AREN'T MINING TO THE CUSTOMERS BITCOIN ADDRESS?? KNC are mining to their own address and have stolen probably half a million dollars worth of customers bitcoins mined on customers machines over the weekend and pocketed it themselves.