On Wed, Aug 21, 2013 at 9:16 AM, Tilman Bayer tbayer@wikimedia.org wrote:
https://twitter.com/hassankhosseini/status/370212655996235776 - he says that this was produced in collaboration with Wikimedian John Vandenberg (CC'ed), who might be able to provide more information on how the numbers were generated.
For some reason, that tweet seems to have been deleted within the last hour, but there is some earlier discussion from that collaboration at https://twitter.com/hassankhosseini/status/283944238473936897 , with other interesting comments ("Running 450 servers for Wikipedia, 150 staff. On AWS you could run that with 2-4 sysadmins")