You can also left click on the scroll bar to scroll to a place.

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).

>it also doesn’t work with a single click

If you hold it down long enough it does do it in a single click.

one page up/down at a time though. It gets there eventually, but it's ugly.

Look again at what I wrote. Auto-repeat translates into successive click events.

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.

On Windows it's effectively a page down. The behavior you are describing is present on other platforms.

On many Windows scrollbars it's pinpoint click once to reach any 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.