I read Digital Foundry all the time, but this article is just showing they're jumping the gun. I read like 19 pages of that GAF thread and noticed all of what was said in the DF article was taken from there and the GAFers have admitted to not being able to fully understand it themselves.
Do I think the Wii U is more powerful than a 360 or PS3? No, nothing shown in games has reflected that, but I'm still interested in truly understanding the hardware and not just making assumptions off an incomplete analysis by the GAF squad.