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my girlfriends laptop does not have anything other than the apple connection but I bought an adapter at monoprice for $5-6.
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Correct. I was responding to your link about a connector that was discontinued over 6year ago, and never applied to a laptop. In fact, back then, Apple did offer a DVI port on laptops, while the rest majority of the wintel laptops offered only VGA. But then they moved forward.
Fast forward to modern times, and you see that Apple offers a MiniDisplayPort across it's entire product line. This port offers video AND audio, unlike the DVI port you lament missing. Further, it allows systems like the MacBook Air to exist, as they simply aren't large enough for a DVI port. The new Thunderbolt port offers further expansion from that same port.
Apple licenses that MiniDisplayPort to others, for free, allowing you to purchase, at your choice, a third party version inexpensively.
I'm not sure why you feel Apple is obligated to tell you about third party accessories instead of their own, but since Apple doesn't license axes, you are free to grind your own.