Those are not the Wii U specs you're looking for. These are probably just fan guesses.
IBM has already gone on record to say that the WiiU processor is 45nm not 32nm. The optical disc is most likely NOT going to be compatible with 12 cm discs since the system is not compatible with GameCube as stated by Nintendo. I wouldn't put much faith into these specs. Also the optical disc size has been pegged at 25 GB not 50 GB (see another linked article).