Interesting question, and one that I often here in my classes.
Is clean, readable, attention grabbing text a trend. Probably not!
One thing to keep in mind as you think about this, is that typography for the web changes as the resolution and types of our display devices change. Many areas of the typographic web display have changed over the years based on the types of devices that we use to view the web. With the changes in the display fonts have come some very interesting studies on how people react to different sizes and styles of text. This includes studies on how screen readers can interpret text in our markup, an area that most people don't even think about, but becoming more and more important as fonts are developed that go outside the normal ASCII character set and accessibility becomes an important aspect of SEO (Search Engine Optimization).
Character sets and how they are displayed on our screens will change as the technology changes. There was a time when we all used these crazy looking fonts and character sets to grab attention to our pages. Anyone that has been around awhile can remember those days, they were not really that long ago. But today, we see much cleaner type sets for those pages. Type with additional spacing, clean character sets, character offsets, etc. All used to make it easier for our users to read through the content. Not to grab attention, but to keep the user engaged in our content and wanting to complete the articles with as little eye strain as possible.
So is it a trend, I don't know if I would call it that, but it is a methodology that will be in a constant flux as view-ports, resolutions and and tastes of our users change with the developing technologies. It is an important aspect of design and one that has many books written on how it should be implemented on different types of web applications. Well worth understanding if you are serious about web development and design.
Colors and Typography two of our most important aspects of web design, properly deployed they grab and keep your users interested in your content.
I hope this answers your question.
Just an opinion......