Hard to believe. Only two days after we broke 2PH, we break 2.5PH
https://blockchain.info/charts/hash-rateNext diff 268M +42%
And because the increase in hashrate came so sudden and late, difficulty is lagging well behind actual hashrate. Even if somehow the network remains flat at 2.5PH for the next 2 weeks, the next retargeting end at the end of the month would be ~350M, that much is already deployed. So 450-500M seems much more likely before the first HF machine is turned on.