Guys, take a look at this chart: The hash rate of the unknown addresses has increased dramatically: http://data.bitcoinity.org/bitcoin/hashrate/6m?c=m&t=l Do you believe it could be solo- or franchised mining done by AM?
I'd follow along here http://organofcorti.blogspot.ca to see if he's able to give a better application of who accounts for "unknown". Or we could just hope AM provides access to the information as we had with erpao.info in the past.