By now, your girlfriend has heard enough about the Henderson-Shogun fight and how it may have been the greatest MMA bout of all time (and, it may have indeed). She knows, and she still doesn't care. What you should be telling her is that UFC had a decent about of grappling and 3 actual, high quality submissions. That's assuming you saw the fights and weren't watching "Twilight: Breaking Dawn" instead. And, if you did see Twilight, don't be a spoiler.
We're lucky, as always, that the Bros. Gracie have come through with another video analysis in their Breakdown series (complete with the requisite hoody/keychain/t-shirt sales pitch at the end ... for the holidays).
Check it out.