I think people understand that their calculator can do arithmetic much faster than they can. No?
Yes, but there's a leap from there to the idea a computer might be able to run the equivalent of neurons faster than a person. It might need to be stated explicitly for people who aren't use to thinking about these issues.
Okay. I added a parenthetical: "computer circuits communicate much faster than neurons do".
I wrote a new Singularity FAQ for the Singularity Institute's website. Here it is. I'm sure it will evolve over time. Many thanks to those who helped me revise early drafts, especially Carl and Anna!