Nope, but its certainly sustainable for the next months which are the ones that truly matter. KnC alone has the production and assembly capacity for ~4 PH per month, and they are looking to expand that. During the next few months, we will see the race joined by Hashfast, Activeminer, Bitmine.ch, Cointerra, possibly even BFL (monarch) and maybe some dark horses (asicminer, avalon, bitfury, .. ?). 117% monthly may well turn out to be a too conservative estimate for the next 4-5 months. Sometime next year it will inevitably slow down but by that time, no one who placed his order today will really care anymore.