Human neurons run at ~100 hertz; computer run at a few gigahertz. An AGI would be millions of times faster by default.
I don't think that's a reasonable comparison. Neurons do a bunch of calculations. It's easy to imagine a AI that would have need a second to get from one mental state to the next.
This is a thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. The previous "stupid" questions thread is at almost 500 questions in about a month, so I think it's time for a new one.
Also, I have a new "stupid" question.