I'm in my mid-twenties, so I like brunch. I'm not sure what it is about brunch that has hipsters my age so excited -- maybe it's because all the best foods can be eaten for breakfast/lunch. Or it's that brunch works for every occasion. You can meet mom for brunch, or perhaps an old friend.
That girl/guy you brought home from the bar last night, the one that kept your roommates up until four with the bizarre sounds they made? What better way to break the ice after an awkward good morning than brunch. Breaking up with the long-term partner? Brunch. First date? Brunch. Business proposal? Brunch. Post-wake family gathering? Brunch.
As you can see, there are many times in your life when brunch is the perfect, civilized means to spend time with other people. Or just to read. We're busy people, but probably not that productive at 11am on the weekend, and hell everywhere has wi-fi so you can even bring your laptop and get work done while settling down for some delicious french toast and coffee (two teaspoons of raw sugar).