Here you go: [this video] I thought it was a really interesting talk - he's a great speaker. Can really tell how well he knows what he's talking about, lots of information really clearly described and easy to follow.
Interesting talk by a great speaker, clear and informative.
Absolutely agreed on the mental processing speed and acute awareness of smaller details. Look at this point in the video:- [this video] He has just opened the floor for questions, and the questioner does not have a microphone and hence audience cannot hear the question. John starts answering the question, but immediately recognizes the situation and then repeats the question for his audience.
Point where Carmack repeats an inaudible question.
For something like a decade (2004~2005 until 2013), Carmack gave a fluent hours-long speech/discussion/brain-dump at QuakeCon. I doubt a few minutes's speech is something he needs "plenty of time to prepare and rehearse" for at this point. Recent examples: 2h50 2013 QuakeCon keynote [link] 2h20 2014 SMU talk [link] 1h30 2014 Oculus Connect keynote [this video]
Carmack's 1.5 hour Oculus Connect 2014 keynote as example of fluent long talks.
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