We have a tiered commenting system here at Gizmodo. This means that great comments—those promoted or made by starred users—will show up first. You can even choose to not see any comments except for these featured ones by hitting the corresponding link at the bottom of the page.
(You can undo this choice by clicking the "See All Discussions" link that will show up at the bottom of the page if you're viewing only featured comments.)
When you're viewing all the comments, you'll be able to tell the difference between featured (or "promoted") and regular comments by looking at the color of the text. Gray comments are plain unpromoted ones while the solid black ones are promoted.