Will an upgrade from 4 to 6 be smooth?

Since Trisquel is based off of Ubuntu and uses the same packages and Update Manager, will the upgrade from Trisquel 4 to 6 be smooth? I ask because Canonical made sure that upgrading from 10.04.4 to 12.04.1 was consistent without broken packages and added/removed what was needed. I'm guessing that Trisquel can use their script as a reference, but of course an upgrade to 12.04 upgrades the user from Gnome 2 to Unity and Gnome 3 components.

This is a very important thing to have before the 6 ISO comes out for desktop and server users since Trisquel 4 with all the updates matches 10.04.4 and Trisquel 6 at this stage matches 12.04.1