The following anecdote about Steve Jobs is from [1]:

  I was sitting in Steve's office when Lynn Takahashi, Steve's assistant,
  announced Knuth's arrival. Steve bounced out of his chair,
  bounded over to the door and extended a welcoming hand.

  "It's a pleasure to meet you, Professor Knuth," Steve said.
  "I've read all of your books."

  "You're full of shit," Knuth responded.

[1] - http://www.folklore.org/StoryView.py?project=Macintosh&s...