Looks like I've found the "solution". It appears that this only happens when trying to run with vsync on. Uncapping the framerate (by disabling the vsync in catalyst control center and by setting the framerate to unlimited) shows all of the models animating correctly. However, even at 1650x1080 with maxed settings, I get screen-tearing like crazy because of the excessive framerate I am running at.
In Titanium, you can clamp your fps down to 60 and everything remains fluid.
So it appears that Sony changed their interpolation to be framerate-based instead of time-based somewhere between Titanium and SoF.
Now I just have to decide which I hate more: Weird model behavior, or screen-tearing from hell.
One last note: When running vsync, if you switch to another view (anything but first-person) the problem also goes away. Odd for certain.
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