OK, it's me again, the grid-view-devotee (-: The grid-view is perfect for a quick scroll-through. Using it feed per feed is unsuitable, cause "mark as read when scrolled past" doesn't open the next feed, so in my case I would have to move the mouse (max.) 144 times to the left. Using this method folder per folder reduces the number of mouse-pushes to seven (seven folders here), but I am too lazy to do that, either (and it doesn't solve the subsequently described problem, too). So, I got accustomed to the BIG river of news, i. e. having a look at ALL unread stories (by clicking on "all site stories"). In this scenario it would be fine to sort by feeds: Revising (say) 500 new stories, sorted from oldest to newest (or vice versa), could be way easier if they were presented in a non-disruptive way ("Ah, interesting, the new album from Sufjan Stevens... ok, next one. Uh, 100 people killed when..." You get the idea.).
