That's why I said "average intelligence and background." Neither one is sufficient. If you dumb it down too far then there's no difference between your presentation and that of dozens of others working in your same field. If you don't dumb it down - and it's not groundbreaking results, and obviously so - then many, perhaps most, people will lose interest within a minute or so.
Frankly, what I was afraid of is that sponsors of research would start making such presentations a requirement of funding. I still am afraid of that, all the above comments notwithstanding.
btw: my BS was in astrophysics, and I'm working in the tech industry now. I'm not someone afraid of science.