well I always thought true Power 7 was crazy for a console I mean that thing is huge. And IBM have always been careful to say custom CPU with "Watson technology" and then gone on to mention eDRAM and their 45nm SOI process that was used for Power 7. The last tweet was the first time they specifically called out Power 7, and it seems that was a mistake.
Now the question is how different is the custom design. I think it's safe to say they have probably added the 50+ SIMD instructions that Nintendo added to Broadway, for Backwards compatibility as Nintendo have pretty much confirmed it's hardware compatibility. Which I imagine where this enhanced Broadway stuff came from, the idea that the CPU is actually Broadway based is a bit silly considering how dated it is.
@TheVoxelman on twitter
