quibbling about the meaning of 'tech savvy' doesn't help us find Dylan, the definition of it can be different to each of us.
IMO we need to think age appropriate he knew how to send texts, use the computer and probably a variety of games, thats very tech savvy compared to someone who doesn't understand how to use a computer or who doesn't use a cell phone
The fact that she works at a college, and with college-aged kids, probably makes her more tech-savvy, or aware of what kids are doing, than many people. I was amazed (and dismayed) when my first son went to college (he's a senior now) at the prevalence of texting.
IMO