It often occurs that several consultants from various competing companies share the same space in a client premise.
There are some who are project oriented, then they get the most from the working group participants regardless the company they belong.
Others discredit competitors people to win a battle on a ground they cannot win elsewhere.
This is because a kind of intolerance is a widely used human behavior (to me a weakness, anyway) marketing strategy.
As a consultant you present yourself as a mix of personal attitude, skills and marketing techniques.
Up to you choosing the right ones.
Journalists almost every day pontificates about intolerance in the most (intentional) confusing way.
The blog author (see following link) really has the nerve to make this clear in just few lines. http://sethgodin.typepad.com/seths_blog/2009/05/marketing-intolerance.html