Yeah, that post is complete bs, I've read wsippels posts in the past and he seems to just post random things to get attention.
Looking at clock speeds doesn't tell you the full power, and there's no way that the Wii U has a tri core PowerPC 750 cpu, that can't be clocked over 1Ghz. Also, we know that Nintendo's using a Power CPU in the console, so that totally debunks that alone.
Plus, bgAssassin reckons it's an OoOE chip rather than in order like the 360, Out of order execution (OoOE)chips can have lower clock speeds, and yet have a better performance than In order chips because they're more efficient. So someone's obviously just looked at most at the clock rate and thought that would be that.
But getting a PS4's your decision, I might get one in the future as well, nothing stopping me from getting both except for the matter of time and money.
It is out of order execution because it's power 7 based. The power 6 was in order execution.
Wii u CPU is very powerful.