I just read this essay by PG
http://www.paulgraham.com/word.html
And funnily enough it reminded me of the Office Hours sections of TechCrunch Disrupt that I've seen online. Sometimes he has people on stage and you see that the conversation is just... "difficult".
Maybe this isn't what was meant by the essay, but I thought I'd share it. I just hope I'm not so difficult to talk to!