A Fascinating Thought That Maybe I Didn't Write

My pal Bart Calendar is a professional ad-writer, and as such you might as well call him a professional chameleon.  When he has to figure out how to market something, he’s gotta speak to his audience in their voice.
As such, he’d said to me that he’d love to write an entry in “my” voice, publish it here, and see if anyone notices the difference.
I’ve wanted to do that for a while, but I don’t plan this journal all that much; I get up, see what’s tickling the ol’ blog-bone this morning – that sounded worse than I meant it – and whatever I felt like comes spilling out.  I allow half an hour for bloggery; sometimes I go over, sometimes I don’t.  And I’d need advance approval on the imitation-post, because it would have to be something I believed; I feel like it’d be a betrayal of my audience, having a post in my name that espoused an idea I actually thought was foolish.
Still.  Assuming the content wasn’t too controversial, I wonder if you’d know.  Bart’s good.  Even if I’ve told you, I wonder if you could tell the difference. I don’t think you could.
It would be the most audacious thing Bart had ever done, however, if he wrote this entry and this one was the imitation, though, wouldn’t it?