Yes, yes I know that 6800XT and the 6900XT just got announced but they will be released after November 10th. This is similar to 2005 when the Xenos GPU for the Xbox 360 was better than any ATI or even nVidia GPU at the the time. The X1800XT was released later in November of 2005 that was slightly powerful and the Xenos even had some features like tesselation features that wasn't prominently featured until later ATI/AMD GPUs.
So, I am impressed with Microsoft to actually put out a GPU on their consoles that will be for a brief period will be the most powerful GPU on consoles that even AMD GPUs won't be able to match. 52 CUs @ 1.825 GHz isn't that bad for a $500 console.
Here's to hoping we will see much bigger graphics leaps this generation compared to last generation which was meh.