alvar-f's Journal: How does the typical Perl, Java or PHP coder look?

Can you guess on the basis of some photos, which language a team of web developers is using?
The photos were taken at the "plat_forms contest 2007", a web development language contest. There were teams for Perl, Java and PHP; three per platform. For other platforms there where not enough teams that met the requirements. The results of the contest will be evaluated by a team of Free University of Berlin and are available in some months.