Was in a bad mood last night when I posted the OP, due to a more experienced (I presume) team-mate piling on the insults, thereby distracting me, thereby causing me to commit even more errors. Though I made mistakes, we were winning for a long time, and I chalk up the loss to the distraction caused me by my team-mate.
You're right there can be a little more than brief information or advice. Even aside from planning, some comeraderie-building bits of chatter can probably also be appropriate, such as cheering when a team-mate accomplishes something or saying "sorry" if you yourself make a mistake or can't help a team-mate for some reason. This can help the team's efficiency, reducing any tendency to get defensive or angry about things that happen in game.