But now there is a new, more detailed, claim...
Nintendo improved with the GPU and RAM, but skimped on the CPU.
Basically, if your game is mostly reliant on the GPU, then you notice the extra power. If your game is reliant on the CPU, then you notice the system's weakness.
This is apparently an issue with the Wii-U port of Warriors Orochi 3, which wouldn't be unexpected as Koei's Warriors series rely on a system's CPU for its number of enemies.
I wonder if it will be a greater problem in the future, if games like Borderlands 2 make an increased push for extra graphical flair through physics simulations. If you don't have dedicated physics hardware, then you can at least use a system's CPU to do some work.