A quick search shows a bunch of sites quoting a 12.5 percent statistic. I know there are a lot of porn ads that skew the perceptions but even taking that into account one percent seems awfully low.

Now, I can believe that porn sites make up a smaller percentage of the internet now that there's mass adoption (when I first heard the 80 percent statistic it was at a time when the internet was still mostly something for us geeks to play with)