Been reading Superintelligence from Nick Bostrom and fell on the childhood intellectual capabilities of John Von Neumann and was wondering on a scale of brain power and brain speed, how did Elon Musk compare. I've read the book of Ashlee Vance but there is no statement about his intellect capabilities. They are obviously extremely high and probably in the 1st percentile but was wondering if you have fallen on a quote of an employee who has worked with him and talked about it.
"Von Neumann was a child prodigy. When he was six years old, he could divide two 8-digit numbers in his head and could converse in Ancient Greek. When the 6-year-old von Neumann caught his mother staring aimlessly, he asked her, "What are you calculating?"