It is most probably multiple people...
EVEN with botting round the clock, the fatigue would destroy you
I've played pretty regularly from launch and I am pretty high up, but that is insane....
Math time
35,931,850 sp since 9/30/2010
169,490 sp per day
Without fail... no days off... no stopping...
Without fighting any of the world NM's
It's possible, if you haven't slept in 7 months
So maybe the Narrator and Tyler Durden could have done it.... (Fight Club reference)
but I'm gonna stake my claim that no one person could get that