One thing that I think is quite important to building a good, productive team is personal similarities. The article touched on it, but I think it deserves more emphasis. In my experience, I work far better with people who share my interests, have similar values, etc. Being able to relate to the people you work with on a level outside of work is a huge boon to forming a good working relationship and mutual trust. It is also something that is often not taken into account enough in the hiring process, and I think this is one common reason you find a group of individually smart people that don't work effectively together.

Clearly this is only one factor among many, but I think having a team of shared, external interests is even more important than this article implied.