Short attention spans tend to preoccupy people who write about “our generation.” We've grown up with pop songs that rarely last longer than 4 minutes (not something to emulate, gentlemen), movies that are almost always shorter than 90 minutes (at which point, while watching on your laptop, you should probably take a break), and most of our reading is online.
We have iPads and smartphones, Netflix and Hulu, Google and Wikipedia—and we’re often using all of them at once. I actually even watched an episode of Arrested Development in between writing the sentences of this paragraph.