The "demo" of Trisquel goes pretty well for about ten minutes (the DE is quite easy for people used to the Win 9x paradigm to understand), then I inevitably get to the point where they want to see the browser or something that requires internet, and it doesn't work. It doesn't work because there are very few desktops or laptops that ship with a wireless card supporting a completely free driver that Trisquel will ship. And that's where the conversation usually ends. Because if the free OS can't let the computer do the things the end-user expects it to do, they won't use it. It doesn't matter if they align practically or philosophically with the FOSS movement, a computer that can't access the internet is just a toy or a paperweight to them.