Culture Surprises in Remote Software Development Teams, ACM Queue vol. 1, no. 9 – December/January 2003-2004, by Judith S. Olson, University of Michigan; Gary M. Olson, University of Michigan and Collaboratory for Research on Electronic Work.
Some researchers argue that the professional culture of software developers mitigates against national differences. Look up this article for more on this: Cougar, J. D., Adelsberger, H., Borovits, I., Zviran, M., and Motiwalla, J., Commonalities in motivating environments for programmer/analysts in Austria, Israel, Singapore, and the USA, Information and Management, Vol 18, 1990, pp 41-46.
I also hold the view that professional culture has mitigated, to a certain extent, the impact of differences in national cultures.