Better late than never, this blogger at kdedevevelopers.org have a look at Kubuntu and is happy – but sees room for improvement.
Read it here
Beside that, Edgy Eft makes a really good impression. Installation took all in all maybe 30 minutes, plus 1 or two hours installing the complete set of applications and transferring files from my old installation.
kubuntu now also has nice GUI utilities for package installation, user management and more, hibernating the notebook simply worked, and upstart also seems to work. So, very impressive !