maybe in theory, but every company I've ever even heard of has been more than happy to throw together almost any random group of people regardless of culture (or even language) as long as they had the right credentials and expect for culture issues to sort themselves out and good quality to appear. But if consistent culture is the important thing... it's a lot easier to find a homogeneous culture in Hyderabad, India than it is in San Francisco, CA (of all places).