Could you clarify what you mean by "fast reading"? I read very quickly and it was like speedbumps for my eyes. If the article hadn't been short enough to fit on one screen I think I would have been annoyed enough to not finish it.
Not that I used that, but I'm a diagonal reader myself and I do appreciate the bold parts. But as I said before, there are 2 things that don't work too well, which is, the current blog theme isn't great and too much bold parts on my side.
Articles linked from HN fall into the 'fast but linear' category. Maybe if I'd ran across your article form a source I give less weight to the bold wouldn't have bothered me ...