This was really clear when Mr Stein asked him a "big picture" question about what Fujitsu could have done better. He had no idea how to answer such a wide and undefined question and just waffled. He is clearly a guy who reads and writes code about his narrowly defined part of the system.
He is a man who sees the trees and not the wood!
Also important to remember re-ASD that higher functioning forms of ASD such as Asperger Syndrome etc were not recognized until early-mid 1990s - at that time GJ had already been working in his little corner of the company for around 20 years.