Sophos article on Botnet Mining.

[nibor]

http://www.sophos.com/en-us/why-sophos/our-people/technical-papers/zeroaccess-botnet.aspx

Claims 630,000 bots all CPU mining at an estimated 4meg/hash/sec. So total of 2.4 Thash/sec. Same size as a big pool at the moment.

Although does say that command and control that was providing the headers to hash was down a lot, so achieved a lot less.