Hello,
If it's clear the distro list is quite messed, I think the distinction between Ubuntu Kubuntu and Xubuntu must be kept, because for install, Ubuntu ships with PulseAudio and Compiz by default, which cause a lot of problems, while Xubuntu is free of that and has its compositor shutdown by default. Another way to get rid of that would be to add a few checkboxes for the known problematic bits of the tests (ie. kind of GPU / Presence of Pulse/Compiz / use of winetricks), which would result in easier work for the bug triagers.
Anyways, I don't want my post to be a "severity levels" 2, so let me know if you think there's interest in digging into this and i'll post on the forum.
Cordially, SD.
PS : this is the first time i post on this list. I'm merely an user, sometimes helping other ones on #winehq and in launchpad. I'm also the self-appointed part-time apprentice of the guru Scott Ritchie :p