Pew Internet reports that 25% of married or partnered adults who text have texted their partner when they were both home together.

Is this a good or a bad development? The answer may well depend on the circumstance.

Social behaviors vary dramatically by age cohort. danah boyd’s new book focuses on social media behaviors of teens — and how they may differ from their parents’ habits and understanding. In one instance described here in the FT, parents are far more immersed (and isolated) by their use of mobile devices in a crowd. In stark contrast, teens are using their smartphones to locate others, share images, and connect.

So 25% of couples texting each other at home is a big number, but what it means depends on who is doing it, and how.