If you mean dragging, then that’s more than just a single click. And if you mean clicking in the gutter, then it also doesn’t work with a single click; you have to make use of the auto-repeat functionality, which takes O(n) time, where n is the distance between positions in number of pages. Shift+Click does it instantly in O(1).

Yeah, I’m missing something here… didn’t he say that it goes down by a page if you click there? I always thought it just took you to that spot.

What do you mean? In my experience and according to the article, it scrolls pages at a time when you left click on the gutter.

I think the article is focusing on the shortcuts.