Me neither. On the other hand, the chip is most likely 40nm and it's quite a bit bigger than an off-the-shelf RV740 - which would be ~600GFLOPS at 550MHz.
Stock 4770s are also running at a higher clock and (probably) voltage. Think about that for a moment. Latte is bigger and therefore most likely has quite a few more transistors. We actually know that because we've seen the die. Again, I'm not saying it's 600GFLOPS or anything, but just looking at the wattage doesn't really tell us all that much.
One thing that people are also forgetting is that there's probably more going on under the hood that we're unaware of. We already know from the Toki Tori 2 developers that there's something going on to save memory for textures and I'd put money on there being another feature giving 'free' use of depth of field, it wouldn't surprise me if they have a similar feature for 'free' AA too.
And I still have the opinion that some of that 5GB taken up by that first update has been set aside for swapspace. We've heard Ancel talk about almost unlimited RAM and it didn't sound to me that he was just talking about the RAM size difference between the Wii U and the previous gen consoles. Not too sure how they'd do that tbh, using the onboard flash would be pretty slow but in large open world games this would be a boon for developers.
We simply know bugger all about the system even after a few teardowns. But one thing we do know for certain - it has 4 times the RAM than the 360, a more modern GPU capable of DX11-equivalent functions (according to one of the guys from Unity), it has more than 3 times as much eDRAM than the 360 which is on-die to boot, the CPU has 3 times more cache and the CPU is more efficient thanks to the system having dedicated silicon to deal with sound and IO.
Anyone with the opinion that the Wii U is on par with or even more ridiculous less powerful than a 360 is more than a little insane lol.