Interesting link .... I truly would not have thought that more than 44 million people in the US alone are still on dial up. That's just insane.
The latest data I could find on the USA Internet population pegged it at around 233 million, so 19% of that is 44 million people; a considerable number. There?s the rest of the world to consider as well, or at the very least, those countries that are part of your target audience.