I participated in the MIT weblog survey.

Results - to be taken with a grain of salt due to the incompleteness of the survey (but if you assume Poissonian errors they won’t change much): This weblog is pretty old…

…as is its creator (the peak in the distribution is around 1979 or so) …

… but the weblog is amongst the more often visited ones (the trackers on this page provided the raw data for this)