Blog Survey

As I'm constructing my blog survey to gather some data for my own research, in comes the results from the survey by blogads. It's interesting that the main age group is 31-40 year olds - not the general accepted consensus. But it's encouraging that a lot of fellow students are blogging, with education being the industry blogging the most - obviously blogging is a good way of discussing and disseminating research. I'd be more interested if the survey was answered by more non-US citizens though. It might give a more rounded view of blogspace - surely 91% of blogs aren't American?