I'm going based on the hundreds of web developers I've interviewed over the past few years. These include people with no formal training, through to people with a decade or more of experience.
While I don't specifically ask for experience with jQuery in job postings, there have only been a small handful of those candidates who have never used it. But even they have often just focused on using YUI, MooTools, Dojo, or some other similar framework instead. The "changing times" the article author talks about happened years ago when it comes to these frameworks.
The same goes for HTML5, minifying, REST, and basically everything else he listed. These concepts are common knowledge these days, and basically everyone in the field that I've deal with has been aware of them, and in most cases has actively used them.
I really don't know what to say to you, if you actually are a web developer and you found many of those concepts to be new. A lot of what the article author lists are pretty well-established and widely-used. "Changing times" doesn't really apply at all well after the change has happened.