Figure is based on all the new ASIC Miners being released. Ibelink over 500 at 11 GH/s for first batch. Thats 5 TH/s, Bitmain with hundreds sold per batch, and by November they would have had atleast 3 batches sent, and others set to release. With just the first batch of ibelink there was already over 5 TH increase nearing 10 TH and not many have received yet.