Hi.............
In my opinion, there are three and only three types of high quality links. Everything else is just fluff (useful fluff in some cases, but not high quality). The expression "high quality" implies that most links won't have similar quality. But people don't look at the meaning of the words in the cool expressions they pick up and repeat. They just like the way things sound and start speaking about "quality links". Except "quality links" is a meaningless phrase, whereas High Quality Links means something special.