Here's the abstract of the source article:
This paper analyzes the (re)emergence of vinyl as an alternative format for music consumption in the digital age. Based on interviews conducted during recent field research on the affectivity of popular music, I argue that youth consumers adopt the seemingly regressive technology of LPs and turntables to resist industry?regulated contemporary modes of music consumption. Furthermore, their participation in vinyl culture enables them to counteract two of postmodernism's core tenets: a preoccupation with nostalgia and a perceived loss of personal agency.
In other words, this article provides no evidence that teens in general really do prefer vinyl, or even that there's a trend in that direction. Instead, he found some teens who do prefer vinyl, and asked them why. The answers weren't too surprising--they pretty much follow what fans of vinyl have been saying for years.
As for trends, vinyl sales in the U.S. were down more than 20% last year, while digital download sales almost tripled. Longer term, vinyl sales aren't dropping, but they aren't rising either, by any measure. Vinyl is a stable niche market, apparently with just enough youngsters coming in to replace the old guys being carried out.