I text my T, but it's usually only for very brief updates or for scheduling. I started texting her because she asked me to send her a quick text update when I was struggling with something. Since then, she's texted me a few times for schedule changes or in response to phone messages I've left her. If I call and leave a message and ask if she can call me back, she'll usually text me and ask if I'm free to talk at whatever time. If I initiate the text to T (instead of her texting me about scheduling something), then its usually just a brief update on how I'm feeling, or a request for her to contact me. I don't like using it for much else. I'd prefer to either email or call - text feels too informal and unreliable to me.