Indeed. I've seen 1215 probes since the start of August, and a rough glance shows something like 30% or more are dialups, cable modems and DSL lines. Better than 50% appear to be addresses without INADDR. Here too I think a sociologist might be useful (by the way I am not a sociologist, I disagree with some sociology, but I have lunch with one or more nearly every week). What is likely to be the population characteristic most common among xDSL connected folk? I think it is small [home|business|shop] relatively unsophisticated, poorly staffed and more likely to have all the bells and whistles on. And maybe the most frequently occuring thing in the population.