What? The post specifically mentioned her noting when he did well:
Then the storm passed. Spiegel resumed moving pieces and examining the game. She pointed out his good moves. “Very clever,” she said when he took the knight. As the game progressed, Spiegel praised his good ideas and asked him to come up with alternatives to others. “You were playing in some ways an excellent game,” she told him, “and then once in a while you moved superfast and you did something really stupid. If you can stop doing that, you’re going to do very, very well.”
Then the storm passed. Spiegel resumed moving pieces and examining the game. She pointed out his good moves. “Very clever,” she said when he took the knight. As the game progressed, Spiegel praised his good ideas and asked him to come up with alternatives to others. “You were playing in some ways an excellent game,” she told him, “and then once in a while you moved superfast and you did something really stupid. If you can stop doing that, you’re going to do very, very well.”