OMG! Here we go again! When are we leaving the crew (because it's certainly not a single individual) who created the paper alone? Bitcoin is the product of community developement, not just from a single individual!
I am sure that it is a single person. I always said that to me, and if it was proved that it was a group of person, I'd have an heart attack !
Calm down and think a bit. It makes much more sense that it's a group instead of a single individual. I'm with the russian, it's clear that the development of blockchain technology required multi-area expertise, and a team of individuals is the perfect image I get in my head when I think about that.