Longer comparison with the main competition: Google News also allows me to group sources that are consistently reliable (which appear in an "Editors' Picks" section that I can customize). The Spotlight section of Google News seems to provide much of the same usability as the prototype site submitted here, showing only headlines at a glance, but as another comment here has already said, news stories are written with lede paragraphs to give you the main idea rapidly.
The kind of automated curation and formatting I look for most in a news aggregation site is not curation for short snippets and formatting for good-looking white space, but curation for quality of content and formatting for information density. As I have customized it on my browser, Google News provides that.
I sympathize with anyone who feels too busy making a living to have time to read. But when I can win reading time, I'm glad to read long articles, and I still try to read actual books even in this era of most people doing a lot of their reading online. I appreciate people working on the issue of getting more reading done in less time, and meanwhile hope that the long writings continue to get plenty of attention from thoughtful readers, and plenty of discussion here among the busy participants on Hacker News.