It is disappointing that DannyHamilton posted the answer to the question, yet people continue to post nonsense.
He gave information on why it has changed on Blockchain.info and the way they guess the current hashrate but did not give his idea of why the hashrate could actually be down. Although yes most just repeated his information over, and now you have gone and put him on his high horse about the ignore list. It was a good answer to OP's question but it leads to discussion and the spread of knowledge when others continue to post instead of a single answer and closed topic.At the risk of explaining something you already know ...
The point of DannyHamilton's post was that graphs of network hash rate don't actually show hash rate, and that the OP is mistaken: there is no evidence that the hash rate has dropped. I think that is a valuable piece of knowledge that he shared with people.
Yet, despite pointing out that there is no evidence of a hash rate drop, various people have still attempted to explain the cause of something that hasn't happened. In contrast to DannyHamilton, they have done a disservice by promoting misconceptions and mythology.
