Bit biased perhaps?
That's not correct at all, right? The only "shared memory" model that Apple currently makes is the Mac Mini. Also, while the x1600 is not a high-end card, I wouldn't call it a "weak" chip. And it certainily smokes through Call of Duty 2 just fine on high settings.
I'm on my way not to rant to the author but rather to add constructive criticism.
EDIT: Eh, forget about it. I'm too late. :-)