my take: when you are the one on stage, do what works for YOU. No matter how you do anything, you can't please everybody, so although dissenting opinion should be considered, it should be weighed carefully against other factors of importance.

Stakes are high in any public presentation. If it looks bad to have a visual aid, it looks far worse to make mistakes or stumble for words.

Rational thinking begins with the assumption that there are no perfect solutions, so we opt for the solution that does the least damage for the highest reward.

In my opinion, the damage done in the minds of a small percentage of the audience who thinks that I'm "cheating" if I use charts is not worthy to be compared to the damage that would be done by a performance meltdown if I hit a snag, and got so flustered I couldn't even remember to mumble or use one of the other escape plans mentioned above.

And I'm a meltdown kind of guy....

https://www.dropbox.com/sh/ey71h8ep047758h/AAC12jNM0Hz9Q8zsh5iDeqNHa?dl=0