I tried it last night at a meeting with 8 people around a dining room table. When the meeting was ending, and everyone was talking, I was struggling to hear people at my end of the table and the person directly opposite me. I set the microphone pattern to narrow-forward and it did seem to help some. Not dramatically, but the conversation around me did subside somewhat. The focus did seem to track when I turned my head to look at each person speaking.
I have noticed the auto tracking under normal circumstances under the automatic setting. For example, was in the kitchen yesterday and had the kettle heating. When I faced the kettle, the sound of water heating became quite apparent. When I turned my back on the kettle, the sound settled into a mild background noise.