No, it was that they were finally putting a MID RANGE GPU in a Macbook Pro. Someone was asking if this would be a large upgrade, which it would.
No, it wasn't. As I said, the 7600GT was available, and the 7950GTX could have been used in a 17" model.
First, yes they did put a low end card in the original MBP. Second, even if the x1600 was the best they could have used-which it wasn't-it would still have been low end.
Actually, yes, the 8600GT is a perfectly solid part, that beats out the 7600GT across the board. The catch with it is that it's sometimes outperformed by former high-end parts that are now selling for mid-range prices, but it's still a solid, if somewhat boring upgrade to the previous generation.
7600GT. 7600GT.
And like I said, the situation was even worse if you looked at the 17" model. Apple was using a low end GPU, while several competitors were selling models with a high end GPU, and in many cases, for less money.