No.  Not a single one, and that's why I find it incredibly hard to believe--especially since this particular forum has had a major problem with account farming, alt accounts abusing campaigns/bounties, and alt accounts contributing to the overall low quality of discussion here.  Let Occam's Razor slice your way through to the truth, no?

On the other hand, I have no idea what communities are like in other countries or if the younger generation (which I am assuming you are a part of) would be more likely to be into bitcoin and tell a friend about bitcointalk.  Still, even as I wrote that sentence the thought that popped into my head was why someone would tell somebody else about this forum--and it'd probably be "Hey, did you know you can get paid to write posts?". 

There's not enough reasonable doubt here IMO, but I'm not tagging any accounts either.