When I go to conferences and sit in the audience, I type transcripts in real-time. I somewhat agree with you, but I have some other evidence that I don't know what to do with:
http://diyhpl.us/wiki/transcripts/
I have found that some people are amazingly well spoken. Absurdly well spoken, as if they specifically chose words so that I could transcribe and type them more easily. Matt Corallo has been really easy to type:
http://diyhpl.us/wiki/transcripts/mit-bitcoin-expo-2015/matt...
For comparison, gmaxwell is more difficult to transcribe because of compressed deeply parenthetical spike bursts:
http://diyhpl.us/wiki/transcripts/gmaxwell-bitcoin-selection...
and I remember jgarzik gave me lots of trouble recently during his talk:
http://diyhpl.us/wiki/transcripts/scalingbitcoin/issues-impa...
For more comparison, here was an impromptu sit-down session with a few (high-energy) friends:
http://diyhpl.us/wiki/transcripts/scalingbitcoin/snarks/
Great results abound when making authoritative statements. I find that I sound the most elegant for hours after I am done with some 10 hour high-concentration programming session. I attribute this to paying more attention to the purpose of communication, whether to transfer knowledge or achieve some other goal, and that good writing/speech is very similar to good programming.
And I have low tolerance for communication when the epistemology is all wrong....