I actually caught a glimpse of this behavior a few weeks ago. I was sitting next to a kid who was maybe around 16 years old snapchatting to his friends that our flight was about to depart. He must have taken around 20 selfies, each with a series of seemingly nonsensical emoji's in the span of 3 minutes.
I was staring dumbfoundedly the entire time. It blew my mind, and made me realize how out of touch I am in my 27 years of age.
I'm 25 and most people I know my age use this app heavily. Maybe not 20 in such a short span but I would still expect heavy use pre takeoff. I don't think this is entirely an age thing especially when we're talking about 20 and 30 years olds.
I was staring dumbfoundedly the entire time. It blew my mind, and made me realize how out of touch I am in my 27 years of age.