But he did mention it. Perhaps you read too quickly: "As a technological demo, FaceTime is impressive. It really is one-click-and-it-works provided both parties have iPhone 4s are are connected to WiFi. "
As the author also says: "Yes, I know, other phones have done video chat for some time now. But the fact that seemingly everyone is talking about mobile video chatting for the first time with this release says just about all you need to say." Nobody is talking about video chat except on the iPhone 4. I have seen it in action and it is clear and sharp video. And also it will be open source for any other vendors who want to use it.
Oops, yes I did miss it. Seems to me a feature that's available in a very limited number of places (as compared to that same feature on other platforms that are available everywhere) is hardly a reason to trumpet a device.
But like I said, if you're happy with it, OK. As far as claiming it's a "trump card" reason the iPhone is better, well, I think you'll need something more convincing than that!