Well, you have to bear in mind that there aren't so much very recommendable
free distros für the majority of users.
Gnewsense is very old, parabola is based on arch and (though I don't have any
experiences with it) may be unapropriate for beginners, dragora has an exotic
packet management system and so on.
You see, trisquel is just a clean, solid, well maintained and easy to use
distro.
It is ubuntu with the lack of the bad and annoying things. First is
proprietary software (bad), second are things like unity, the software center
or the apportgtk thing (never encountered it in trisquel).
In my opinion, trisquel did nothing magical, but the right thing. So the
changes applied to ubuntu are not huge, but they are well chosen. And thus
it's no wonder the fsf is proud of it.
I'm just happy it's there.