To be fair, the gourmet food trucks are quite a bit better than the roach coaches that Pio is describing. And I've eaten from plenty of those and taco trucks as well.
I'm just surprised by how many hipsters are willing to wait in massive lines at these food truck festivals in both California and Arizona recently.
But yeah, the Twitter thing probably has something to do with it as well (and Yelp loves them as well). It's like you have to be in a private group to know where the trucks will be - albeit, the world's easiest private group to join