They've stated that they plan on bringing 500 Th/s online by the end of the year. That is a valid possibility. If they did and they controlled 5% of the network, then the network hash rate would be 10 Ph/s. I think it's more likely that Labcoin will have 500 Th/s online than the network will be at 10 Ph/s by the end of the year. If the network was at 5 Ph/s then LC would need 250 Th/s. If they get their problems sorted and hit their targets they'll have around 200 Th/s in November.