No surprise, that phrase "bunch of" is popping up in mainstream rhetoric. For example, a help-wanted on Craigslist, targeted at Millennials, is headlined "Need a bunch of writers."
Clients and prospects from all generations and all industries ask me, "Should we be talking and publishing articles which mirror the language of tech Millennials?" The answer, as always, is: That depends.
One major variable is the personality of the speaker or author. Venture capitalist and thought leader on a growing number of topics Peter Thiel has the protean personality to leverage just about all kinds of rhetoric. He could talk like the head of a buttoned-down detergent company or the drummer from a new music group.
Others better test out their choices of language with members of generations Y and Z. If the youths giggle, steer away from what's new and so cool.
Another variable is audience. And that's a wild card. Sure, you're talking to the sophomores at the University of Michigan. But that doesn't give you license to borrow their language. Have your staff do a deep dive interviewing some of those who will be in the audience about their expectations in semantics. Probably if you are a member of Generation X or a Baby Boomer they would anticipate some measured rhetoric and not a steady stream of cool.
A third variable is the occasion or the reason for publishing the article. If it involves gravitas, then probably not even a Millennial would use "bunch of." If it is lighter, then, again, do research on the audience you will address or the tone readers are comfortable with.
Bridging the rhetorical gaps between generations is a work in progress. What I had reservations about including in the book and articles I ghostwrote for Millennials in 2013 I treat as mainstream currently. In short, sensitivity to language is as critical a task as making the content provocative.