Exactly a lot of real world (older) users do this and I cringe a little every time I see it. They don't even know that you can single click. This isn't a huge issue, but it's much more common than the people here seem to think.
I see alot of younger people are like this about some things. (but not single-clicking obviously.)
How about raking your scrollwheel through fifteen pages to get somewhere? Analog scrolling, I call it. Because that's what it is, a skeuomorph of scrolling through a microfilm... I would've thought the advantage of having a computer was that you can go directly to page n, to line n, whatever.
In terms of efficiency, I would liken the scroll wheel to the arrow keys: it's alright for small distances, but not more.
