Kaptin M
I am not an psychologist, but i do have a masters degree in a related area and human performance is central to my work.
The statement from the occupational psychologist that you quote is very black and white and psychology is a very much a grey area.
What s/he may have meant is that some high performing teams are not socially friends nor do they necessarily like each other on a personal basis, but that there is a common strong team bond derived from their ability to deliver strongly in a work environment.
Often the leadership is crucial to this aspect; if you are really interested, I could suggest a couple of source books to look at. However the great thing about the soft sciences is that your opinion is probably as valid as anyone elses!