Tried it in Galaxy S2 running CM10.1. I was able to see the users under setting and could create new user just fine. But I couldn't see the users under power menu even when I had enabled the option under "Google Nexus (all)"
Thankfully the OS loaded with main user when I simply rebooted the phone, else I would have stuck in the void with test user.
Also any idea if this mod will be featured by a official thread on XDA?