I've only been on the CA version of Toy Story Mania, but have never waited more than 30 minutes. If the line is longer, I skip it. Even here in CA it still has a long line most of the day. Much better received than Little Mermaid for one of the newer attractions at DCA. Mermaid is usually a walk on here.

I enjoyed the original backlot tour, back in the days when the Studios were a real studio. I still go on it because it is one of the unique WDW attractions.