It's hilarious, but of dubious origin. Simon Edhouse says it's fake[1]. I have no reason to trust him, but I also don't have any reason to trust David Thorne (and DT is known for pranks).
While it proves nothing, I have had the misfortune to have met a couple of people who act almost identically to the everyday Edhouse, and, on an off-day, exactly like the rather more extreme Edhouse as presented by Thorne. The two personalities are perfectly consistent with each other, in my humble experience. It's not a million miles from Calacanis.
I'm leaning towards 'exaggerated for comic effect', as opposed to 'exactly as it happened' or 'made up'.
[1] http://www.naymz.com/simon_edhouse_864677