A quote like this gives hope to all of us.
No matter how complex or massive the software, it's surprising to find out it was written by one or two people.
I see this all the time. I once implemented an ERP package in a $100 million company. I called customer support and got one of the 2 guys who wrote the package! I couldn't believe it.
Believing that one or two people can code something large and awesome is often the first step to doing it yourself.