Check the video, I think he's 100% right.
When I played Unreal Tournament in 99/00 as my first multiplayer game there weren't many kids flaming each other, internet wasn't new back then, but it was certainly not available to all the kids like it is today.
Nowadays the majority of internet users playing games like LoL, WoW, CoD etc. are children.. Children who now dictate the internet culture, which makes older people adapt to the culture.
Videos, streams, forums or meme's that turn really popular, is because of kids, they are in the vast majority you see on the internet today, they bring the views, they decide what is the latest hype, they shout the loudest.
It's kinda hard to imagine you think of people aged over 30+ go "YOLO" or "LAWL" and all that crap that people do today.
What do you guys think? I posted this because I do know already about what Athene explained in the video, I just didn't think much about it until now after he said all that.