But, having not seen the typo, I can't judge on the impact on the quality of presentation.

And again, that "minor" difference might be the result of a last second change.

And we've ALL seen that type of stupid crap slip through, no matter how professional. I try not to pick on trivial issues unless I'm in pedant mode, and my goal is to merely annoy an enemy, rather than try to gain an understanding.

And after that point, can we even change it when it goes for the public release as part of the conference? Very unlikely. I've seen the material used on the presentation screen a bit more up to date than what came with the materials since it got a final once over.