This was one of the best/most pleasing stories I've heard on Escape Pod in a long while. To my read, the story isn't about the specific mechanism of the minder device, that's just a tool used to talk about the social implications of isolation and the evolution of how we think.
Think about the role smartphones have today as opposed to mobile phones of a decade ago, for example. In 2005, pulling your phone out to do anything other than make or receive a phone call would be unusual but now we get answers from Google, see what our friends are doing on Facebook, check what news alert just made our pockets buzz, etc. The social acceptability of involving technology in face-to-face interactions has shifted too; the idea of someone googling an answer to something in a conversation used to be a subject of ridicule. "iPhone users are so annoying", the trope went, "because they're always looking stuff up." As time passed, though, the structure of conversations has slowly shifted towards making allowances for someone to quickly check something. If there are three people talking and one of them is quiet for a moment while looking something up, the other two are more likely to keep conversing without making a big deal over the third person who has temporarily checked out.
Kids text each other from the same room, my wife and I use SMS even while sitting next to each other when we're in the room with our kids to have our own private conversations sometimes while still enjoying the company of the rest of our family.
Society is changing, and the way we relate to others is changing with it. Remember the TNG episode 'Darmok'? There you had basically a civilization of meme users. The shared references were vital for basic communication and maybe it seemed like a silly exaggeration when it aired, but how different is "his arms wide open" from "i can haz cheezeburger"? The meaning is presumably different, but the shared referential language is real. In the story, the protagonist was temporarily cut off from that shared culture and it had a real effect on how she related to the others. When I was a kid, the home-schooled children always seemed a little 'off' and we had a difficult time relating. Using that as an anecdotal datapoint in combination with the current developing internet culture as another, the scenario described in this story seems to be a completely plausible extrapolation.
Anyhow, super karate bravo to the author. Compelling, thought provoking, and a real pleasure to listen to.