First thoguht: Huh. Another former Retro guy who has worked on Halo 4. The comparisons to Metroid Prime are becoming increasingly understandable.
Final thought: I wonder if DKCR3D could be 60 FPS if there was an option to turn 3D off altogether. Like Super Street Fighter IV...
Super Street Fighter 4 plays at 60 fps with the 3D ON, besides a few drops once in a while on firmware 1.0.0-0.
But I now got 5.1.0-11, which even Sonic and All-Stars Racing Transformed runs at 60 fps with the 3D ON when it only does up to 20 to 30 fps with the 3D ON on firmware 1.0.0-0.