Texting is less invasive. You send a text, and that person can look/respond to it at their leisure. You can text someone while they are sleeping, or in a meeting, eating, or pretty much anywhere, and it is far less intrusive than a phone call. I have no problem answering a text in just about any situation, but I may not want/be able to talk on the phone. Most of my texts are for information that is not enough to warrant a phone call. I can text my wife that I will be home late, instead of having a 15 second conversation.