Google Reader "sort by magic"

Just ran across the "sort by magic" feature on Google Reader. I always thought a news reader app should help you find the articles you're interested in, and now it seems Google has delivered on that idea. I look forward to seeing how well this works. All it requires, apparently, is that your mark articles as "liked". Arguably, it should also take into account starred and shared items as well, right? For now, I'm marking my starred items as "liked" (recent ones anyway). Fortunately, you can apply this option to individual feeds, and I only intend to use it on the high volume, heterogeneous feeds (e.g., ServerSide, InfoQ, etc.).