For my perspective, I work in Fin/Tech so part of my job is knowing mobile apps like Snapchat, Kik, Messenger, Venmo and others. Perhaps an advantage is that my company's strategy includes intense focus on attracting users under 25 so this is really familiar territory for me.
Having said that I have adapted my communication style as others have mentioned above. This means:
1. Favoring short texts which may be separated by minutes or even hours as part of one conversation.
2. Using TLA's (That's "Three-Letter-Acronyms" for you old farts out there

like DTF, SMH, LOL, and others without appearing awkward. (Note: I make extensive use of the Urban Dictionary)
3. Not referring to what I call anti-pussy topics like politics, taxes, foreign policy, immigration, crime, 401k's, Facebook, Myspace, MTV, and anything else that under 30's don't care (or know!) about. Safe topics: current pop/rap stars, Beyoncé, eCigs/Vaping (yuck!), Pot, Netfix/Amazon Prime (but not HBO or cable tv), Uber/Lyft, sex (during negotiations), and "how much money you gonna give me daddy?"
4. Never - and I mean never - challenging her ideas or decisions or opinions on generally controversial issues by citing actual facts to support your point of view. Instead, just generally agree and move to a new subject. After all, she's had a whole 14 months in community college to become a well-informed, experienced, and highly functioning adult member of our global economy and we are just too old to "get it". :p (As Mark Twain once said: The older I get, the smarter my parents get.)
Signing off..
The Cat
Phone: KLondike5-5432