Spanish group dynamics

I had a discussion with one Spanish guy who have been living for few years in Finland. In his opinion Finnish are much more independent than Spanish. I have also noticed that Spanish like to be more in big groups than Finnish. I have witnessed during all the previous semesters Spanish forming one big group in Finland and in Turkey. But last semester Spanish exchange students did not form one big Spanish group even there were at least 15 Spanish exchange students in Kuopio. All the Spanish knew each other but they never formed a Spanish group. As there is not one big Spanish group I have been speaking less Spanish than in previous years. Often I have been speaking English with my Spanish friends.