Seems like it and endgadget.com says it' s from Factor 5 developer that leaked the right X360 specs.
There are some innovations here.

Check this link for full SPECS report by pro :

http://arstechnica.com/staff/carthage.ars/2005/9/23/1348

-multithreaded PowerPC 2.5 GHz with 256 KB L1 cache and 1 MB of L2 cache
-Physical Processing Chip (PPU) with 32MB of dedicated RAM,
-512MB of system RAM
-custom ATI “RN520” 600MHz CPU with 256MB of RAM
-external resolutions up to 2048 x 1268 though HD support is still as yet undecided,
-7.1 surround, too.

I' m a bit shocked cause I' ve just read about separate PPU appearence in PC market and how cool it' s supposed to be.

The PPU is the new thing breaking in the PC industry - it' s supposed to do what seperate GPU unit did for 3DFX era.

It' s a separate Chip with 32 RAM doing only one thing - Physics - Games like Half Life 2 put that to use in PC' s and more devs are looking forward to it saying quite nice things :)

Here is some nice info :

http://www.ageia.com/technology.aspx - short info

http://www.ageia.com/pdf/wp_2005_3_physics_gameplay.pdf - deep info :)

I wonder if those specs are real but since Nintendo never hyped their proccesing power they might be right.
Their systems never were the least powerfull even though people stated they are before release.

Still it could all be false mind you :)

http://www.engadget.com/entry/1234000077060215/