It is nothing more than a shot in the dark. For the newer Panasonics, you would probably be better off to follow advice of "Select Default Cinema Mode; Set Motion Smoothing to taste..."
If you follow DNice or CNet settings, you at least get something that is designed for your Series (ST; GT; Whatever...).
As htwaits already noted, a lot of users report satisfaction with the Disney WOW disk. Note that some DVDs/Blu-rays have a THX home theater set up menu - however it is pretty basic, and have heard some complaints about their test patterns.
A better bet is download a copy of the AVS HD 709 - this is a wonderful free tool that not only has a wide variety of test patterns, but also an useful series (from YouTube, per memory) on Calibrating a HDTV.
Used this to do a quick & dirty "calibration" of our ST50 - after 200 hours or so of usage - using Default Cinema as the starting point, and am very happy with the results. (Note that "very happy" does NOT mean that I presume it is "perfect," or even "As ACCURATE as is possible" - simply means that WE are Very Happy with the resulting PQ!).
In a couple of weeks, intend to spend some time tweaking the panel with No. 1 Son - using his set of fancy colored filters & commercial calibration disk - but he was over this weekend to watch "Girl With the Dragon Tattoo," and - AFTER reviewing portions of the movie back at his house - he sent a note lauding the PQ on the ST50 ("very transparent...."; "am officially jealous...") - and we had ended up Very Close to Default Cinema settings after running through the HD 709 steps.
Unit to unit variations may come into play - which is a good reason why "One Size Fits ALL" settings remain something of a gamble - but the OOTB PQ on the 2012 ST50 series (and presumably all of the Pan plasma panels) is Very Good....