Parentage

(Since my spanish is very very very bad)

They talk about the need to be very close to Debian and avoiding trying to work around Debian's maintenance/packaging policies.

I don't know, it could just be a very old webpage.

But if they did switch back to Debian from Ubuntu they would not be the first ones. Xandros/Freespire did that.. they migrated from Debian to Ubuntu due to Debian's dismal ability to actually getting a release, er, released. But they've switched back, presumably by the difficulty poised in trying to make Ubuntu stable and work for their purposes.

Now if Debian actually could release software on time there would of never been need for Ubuntu and all of this would be a non-issue. I understand why Ubuntu decided to break free from backward compatibility.