I've been running ZorinOS 3.2 Long Term Service on an old Aspire One SSD netbook and last night got a wild hair and thought I'd install the newest version, Core 6.
Good move.
Now based on Ubuntu 12.04, Core 6 has a new log-in screen and a tweaked desktop.
Performance appears to be excellent. Very speedy.
If you're interested in downloading the .iso suggest you get the torrent from Linuxtracker. Downloading it direct from Zorin takes forever.